1: One final, huge Greek goddess (3)
2: Bolt I have inserted in right frame (5)
4: Culpability starts to goad us into leaving town (5)
5: Reveals fatness I'm developing (9)
6: Workers are in giant red star (7)
7: Spread of the ocean encompassing fish (9)
8: Employ heart-broken Spartans where disaster came to pass. (11)
11: Girl mostly into turning inside out - it's never ending! (11)
14: Young horses mistakenly resign early without hesitation (9)
15: These people don't know 'Cats' song I arranged (9)
20: Tightener with improved tuning (4,3)
22: In Howard's End - one has a passage here from Forster (5)
23: Fish I applied to reveal the deeps. (5)
26: What's left when you burn the tree (3)