At home to fix a piece inserted (5)
I believe the answer is:
inset
'a piece inserted' is the definition.
(I've seen this before)
'at home to fix' is the wordplay.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'to fix' becomes 'set' ('set' can be a synonym of 'fix').
'in'+'set'='INSET'
(Other definitions for inset that I've seen before include "Placed inside" , "Stein (anag)" , "Small diagram contained by larger one" , "Part of magazine" , "lesser feature" .)