Farm building for storing crops (7)
I believe the answer is:
haggard
'farm building for storing crops' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for haggard that I've seen before include "Englishman who wrote" , "Rider" , "Careworn - novelist" , "Drawn, gaunt" , "Looking tired and unwell" .)