Check about home (4)
I believe the answer is:
rein
'check' is the definition.
(both can mean to control or limit)
'about home' is the wordplay.
'about' becomes 're' (regarding**).
'home' becomes 'in' ('he's home' can mean 'he's in').
're'+'in'='REIN'
(Other definitions for rein that I've seen before include "Animal controller" , "given free to experienced riders?" , "Strap on a bridle" , "Restraining lead" , "A means of control" .)