Across:
1 Network (WEB-) mostly (p) for soldiers (“camp” without ‘p’ = -CAM) (WEBCAM) bringing others to view the site (WEBCAM),
4 Admires (IDOLISES) one (I-) party (-DO-) on Isle (Isle = -LISE-) angry (= anagram indicator) with head of state (head of ‘State’ = -S) (IDOLISES),
9 Half the biography (half the ‘LIfe’ = LI-) doesn’t tell the truth (-LIES) (LILIES) of those who spent some time in the nursery perhaps (LILIES),
10 Persuade (CONVINCE) Clare (-CE) to finish (= positional indicator) deception (CON-) with French wine (French ‘wine’ = -VIN-) (CONVINCE),
12 WAG’s (wags/jokers = CARD S-) instrument (-HARP) (CARD SHARP) for playing dishonestly with The Pack (CARD SHARP),
13 Organist from watering holes (‘organist’ from ‘watering holes’ = wehle = WHEEL) produced disc (WHEEL),
14 Lots of DNA (BODYBUILDERS) found in gym (BODYBUILDERS),
18 They take back land (FORECLOSURES) with a warning on the links (warning on golf links = FORE) to certainly (-SURE-) what’s dividing walled vineyard (clos = -CLO-S) (FORECLOSURES),
21 Ladies’ men missing Isle? (‘ladies men’ missing ‘isle’ = admen = AMEND) Correct! (AMEND),
22 Master (M-) engineer (-E-) taken in by warring (= anagram indicator) infidel (infidel = -INEFI-LD) (MINEFIELD) in dangerous area (MINEFIELD),
24 On the radio (= homophone indicator), Jim (‘Jim’ = ‘gym’ = PE-) Power (-P) spills the beans (TALKS) (PEP TALKS) leading to motivational speeches (PEP TALKS),
25 It’s about (RE-) one of the Turners (-TINA Turner) (RETINA) the ophthalmologist has his eye on perhaps (RETINA),
26 They’re not working (STRIKERS) with the attackers (STRIKERS),
27 Buddy (P-AL-) welcomes second (-S-) manuscript (-MS-) (PSALMS) of poems from good books (PSALMS).
Down:
1 What the whistle-blower produced perhaps (WOLF whistle) for the young reporters (CUBS) (WOLF CUBS) and the newer members of The Pack (WOLF CUBS),
2 Large deb (large deb = BELGRADE) dress (= anagram indicator) produced with capital (BELGRADE),
3 Jumps from Dancing on Ice (jumps from Dancing on Ice = AXELS) to parts of The Transporter (parts on the transporter/vehicle = axles) reportedly (= homophone indicator) (‘axles’ = ‘AXELS’) ,
5 Tweeted perhaps: (DROPPED A LINE) “Went Fishing” (DROPPED A LINE),
6 Those familiar with current problems will recognise these (LIVE WIRES) as it happens (LIVE) from telegrams (WIRES) (LIVE WIRES),
7 Stay away from Sunday best (‘stay’ away from ‘Sunday best’ = undbes = SUNBED) – this is all you need for lying on the beach (SUNBED),
8 Stretches (SPELLS) bank’s sperm cells (banks ‘SPErm ceLLS’ = SPELLS),
11 The Taoiseach was one such (CABINETMAKER) producer of The Chippendales (CABINETMAKER),
15 Presumably, they know the differences between A and B (BLOOD BANK knows the differences between A and B bloods) for those in the circulation business (BLOOD BANK),
16 Extract (extract/remove = FREE) from Shakespeare (WILL) (FREE-WILL) relates to self-determination (FREE WILL),
17 Cures sad (cures sad = USED CARS), sick (= anagram indicator) types, no longer in their prime but still capable of going on the road (USED CARS),
19 Travellers’ guide (map = PAM-) reviewed (= reversal indicator) with postscript (-P-S) about area (-A-) (PAMPAS) of flatlands around Buenos Aires (PAMPAS),
20 Assistance sought (HELP-) in hospital (-ER) (HELPER) for right-hand man (HELPER),
23 Releases (FREES) shell fire missing hill (‘shell fire’ missing ‘hill’ = sefre = FREES).