Leafy lunch (5)
I believe the answer is:
salad
'leafy lunch' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for salad that I've seen before include "Raw greens, mainly" , "Counter serving cold vegetable dishes" , "Mainly raw cold dish" , "Raw vegetables, etc" , "Cold dish of vegetables or fruits" .)