Piece of lettuce put over piece of meat? (3)
I believe the answer is:
cut
'piece of meat?' is the definition.
'piece of lettuce put over' is the wordplay.
'piece of' indicates a hidden word.
'put over' says the letters should be written in reverse.
'tuc' is hidden within 'lettuce'.
'tuc' in reverse letter order is 'CUT'.
(Other definitions for cut that I've seen before include "Intersect; reduce" , "Truncate; slice" , "slice of the cake" , "Qualification mark during a golf event" , "Lower" .)