Light grey-brown colour (4)
I believe the answer is:
fawn
'light grey-brown colour' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for fawn that I've seen before include "Bear does, maybe" , "Try to please" , "Flatter, be obsequious like young deer" , "Greyish brown" , "Young deer - beige colour" .)