Leaves in salads (7)
I believe the answer is:
lettuce
'leaves in salads' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lettuce that I've seen before include "Garden plant with edible green leaves, good in salads" , "Cos salad vegetable" , "Salad green" , "Green stuff used in salads" , "food" .)