Grain in granary, evidently! (3)
I believe the answer is:
rye
'grain' is the definition.
(rye is a kind of grain)
'in granary evidently' is the wordplay.
'in' indicates a hidden word.
'RYE' is hidden within 'granary evidently'.
(Other definitions for rye that I've seen before include "Cereal - liquor" , "Whisky; Sussex town" , "J D Salinger novel 'The Catcher in the ...'" , "Hard liquor" , "old port" .)