Barn, abode, unusually for this vegetable? (5,4)
I believe the answer is:
broad bean
'this vegetable?' is the definition.
(broad bean is a kind of vegetable)
'barn abode unusually' is the wordplay.
'unusually' is an anagram indicator.
'barn'+'abode'='barnabode'
'barnabode' anagrammed gives 'BROAD BEAN'.
'for' is the link.
(Other definitions for broad bean that I've seen before include "Green vegetable" , "plant" .)