Dish in sink captured by Turner in pictures (7)
I believe the answer is:
lasagna
'dish' is the definition.
(lasagna is a kind of dish)
'sink captured by turner in pictures' is the wordplay.
'sink' becomes 'sag' (sagging is a kind of sinking).
'captured by' indicates putting letters inside.
'turner in pictures' becomes 'Lana' (Lana Turner, actress in films or 'pictures').
'sag' placed within 'lana' is 'LASAGNA'.
'in' acts as a link.
(Other definitions for lasagna that I've seen before include "Italian cooking" , "Baked pasta dish" , "Calorie-rich food" , "Italian food" , "Broad flat pasta" .)