Farm building may make wife and child disheartened (5,4)
I believe the answer is:
dutch barn
'farm building' is the definition.
(I've seen this before)
'wife and child disheartened' is the wordplay.
'wife' becomes 'dutch' (I've seen this before**).
'and' is a charade indicator (letters next to each other).
'child' becomes 'bairn' (bairn is a kind of child).
'disheartened' suggests removing the centre.
'bairn' with its centre removed is 'barn'.
'dutch'+'barn'='DUTCH BARN'
'may make' is the link.
(Other definitions for dutch barn that I've seen before include "Building for hay storage" , "Farm building for storage" , "hayloft" , "where hay is stored" .)