Under which to hide a light 60 lb of wheat, perhaps (6)
I believe the answer is:
bushel
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for bushel that I've seen before include "Don't hide your light under this grain measure" , "Eight-gallon measure of capacity - under which one's light should not be hidden" , "Old measure of capacity" , "Four pecks" , "Old unit of dry measure (under which one hides one's light?)" .)