Scots child I housed in farm building (5)
I believe the answer is:
bairn
'scots child' is the definition.
(Scottish term for a child)
'i housed in farm building' is the wordplay.
'housed in' indicates putting letters inside.
'farm building' becomes 'barn' (barn is a kind of farm building).
'i' placed within 'barn' is 'BAIRN'.
(Other definitions for bairn that I've seen before include "A tot of Scotch" , "Child (of the North!)" , "Scot. child" , "Child in Scotland" , "Scots child" .)