Stalk of dry grass (5)
I believe the answer is:
straw
'stalk of dry grass' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for straw that I've seen before include "Pale-yellow - through which one can drink" , "Residue of threshed corn" , "Stems left after grain has been removed" , "Warts (anag.)" , "trifle" .)