Suffer from lack of food (6)
I believe the answer is:
starve
'suffer from lack of food' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for starve that I've seen before include "Die from lack of food" , "Averts (anag)" , "Go without food" , "Deprive of food" , "Suffer from want of food" .)