Dried grass (3)
I believe the answer is:
hay
'dried grass' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hay that I've seen before include "Meadow crop" , "Make . . . while the sun shines" , "Dried grass as fodder" , "Welsh festival" , "It is to be made while the sun shines" .)