The remaining unanswered clues are as follows (all answers are hats and other headgear):
15. Give them the lip treatment. (4,6) 19. ... and this for the pot-bellied! (9) 24. A blow to the head at sea. (3,6) 32. A man allowed this round his head? It's rather flowery! (7) 41. Eleven in a pastry case followed by twelve. (5,4) (Pixie hood? Pixie is XI (eleven) inside PIE (pastry), but can't see the "twelve" link for hood)