Extend talk about home (4,3)
I believe the answer is:
spin out
'extend' is the definition.
(spinning out is a kind of extending)
'talk about home' is the wordplay.
'talk' becomes 'spout' (spout can informally mean to talk about something).
'about' is an insertion indicator.
'home' becomes 'in' ('he's home' can mean 'he's in').
'spout' going around 'in' is 'SPIN OUT'.
(Other definitions for spin out that I've seen before include "Message for fast bowlers only" , "jaunt in car" , "Prolong" , "keep going longer" .)