Cold and bleak for crop (4)
I believe the answer is:
craw
'crop' is the definition.
('craw' can be a synonym of 'crop')
'cold and bleak' is the wordplay.
'cold' becomes 'c' (eg on taps).
'and' is a charade indicator (letters next to each other).
'bleak' becomes 'raw' ('raw' can be a synonym of 'bleak').
'c'+'raw'='CRAW'
'for' is the link.
(Other definitions for craw that I've seen before include "Crop the unacceptable sticks in" , "Gizzard" , "throat" , "Bird's pouch for storing food" , "Stomach of an animal" .)