It might help if you left a comment that had the intended solution/parse for each. I think you're using indirect anagrams in some (like 4D), and loose definitions in others (6A, 11D), and that makes it a bit hard to guess intent. Where I got wordplay, the surface sense sometimes seemed a bit off, as with 2D, or in the wrong tense (like 7A, where it should probably be "Vehicle to fall apart..."). I really liked 1D, and there are bunch more that I like the sound of, but didn't fully follow. All the best to you!
General fruit/veg theme.
1a: POM + EG + RAN + ATE (prior run/eat) = French Grenade. (Grenades named after pomegranate).
6a: TO MA (Dear mum, as in a letter), TO (repeating part of TOMA) = tomato
7a: CAR + ROT, underground veg.
8a: NEEPS + ARIA anagram (combination) = continental fruit (asian pear)
12a: star group (constellation) - replace start of tough (OUGH) with PL (.pl domain name)
13: DEC (winter month), after AMP (single unit of currency) - decamp (move on)
14. Flawed (anagram) rubies rebel - blueberries (popular muffin filling)
1d: Peach - P + EACH
2: Anagram ("cooking") of DRAMAS
3. Wrong 'un - rotten apple. ROT (a 'tor' backwards) + anagram of PEN (writer) PLATE (gild).
4. Demolition job (anagram) ON ROME = no more (finally completed)
5. Lead (tether). Emotional explosion at end - person reaching 'end of tether' is often angry!
8. ABLE (Timetable without times, so no 'time' + no 't') + IS. Unexpected (anagram) = ABSEIL.
9. ICE AGE (number of years since water was turned to ice...)
10. Old pupils (Alumni). ILLUMINATE - TILE = LUMINA, broken (anagram).
11. Crisps in USA are 'chips', can be found in 'tai-CHI PSychaitrist'