1: Massage central skeleton for money (5)
4: By luck, lab reconstituted molecule (9)
6: Die to get satisfactory marks for ones French fries (4,2,4,5)
9: Fool to join recital (3)
11: Sister gets nothing, we hear (3)
12: Count Tadeusz's first friend (5)
13: Thoroughly go over Quattro before start of test-drive (5)
17: I've lost struggle (3)
18: Hellish center for immigration? (5)
19: Meal for 4 divided by 50 (5)
20: Begin suspecting like you're clever (3)
22: Cleaning aid possessed by Fragonard (3)
23: Powerful individual accommodates American doctor connected with parts of hospital drama (5,10)
25: Large glasses used on ships (9)
26: Served raw, across keeps us hidden within. (5)