Set up home above stable? (7)
I believe the answer is:
install
'set up' is the definition.
(synonyms)
'home above stable?' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'above' is a charade indicator (letters next to each other) (in a down clue, some letters go above others).
'stable?' becomes 'stall' (I've seen this in other clues).
'in'+'stall'='INSTALL'
(Other definitions for install that I've seen before include "Place in position, establish" , "Load up" , "Lodge" , "Set up, ready for use" , "Put in - invest" .)