Bundle of grain stalks (5)
I believe the answer is:
sheaf
'bundle of grain stalks' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sheaf that I've seen before include "A bundle, of corn stalks or papers" , "Bundle, of grain stalks say" , "Bundle of cereal plants" , "Reaper's bundle" , "Bundle of wheat" .)