The beginning of each answer is / or sounds like / a first name. - The additional cryptic clue leads to the required full answer. e.g. Do these singers have trouble with notes? (9) ...... BARITONES.... Barry / Tones
1) Iron out delay with a little banter. (10) 2) Old cart I dismantle. (9) 3) Subversive literature, it hides letters disributed from AZED out East. (8) 4) Get into gallery, get right in! (9) 5) May confess, when gaining weight in London. (10) 6) Return of thin strip, important for reproduction. (8) 7) Church member requires help in data analysis.(15) 8) Fertilise with neat arrangement. (9) 9) One will join twin outside Holyhead. (5-5) 10) Patron in favour of covering performance (10)
4. must be something like filtrate (phil, r in tate gallery) but that's only 7 letters so it should be infiltrate but I've never heard of anybody called Inphil!!