Fodder left frequently up in the barn (7)
I believe the answer is:
hayloft
'up in the barn' is the definition.
I can't tell whether this defines the answer.
'fodder left frequently' is the wordplay.
'fodder' becomes 'hay' (hay is a kind of fodder).
'left' becomes 'l' (common abbreviation).
'frequently' becomes 'oft' (oft can mean frequently, eg oft-quoted).
'hay'+'l'+'oft'='HAYLOFT'
Can you help me to learn more?
(Other definitions for hayloft that I've seen before include "Stable component" , "Where to store straw in stable" , "room above stable?" , "Food store in stables" , "fodder store" .)