Extend trip away from home (4,3)
I believe the answer is:
spin out
'extend' is the definition.
(I know that extend is a is a kind of of spin out)
'trip away from home' is the wordplay.
'trip' becomes 'spin' (I can't explain this - if you can you should give a lot more credence to this answer).
'away from home' becomes 'out' (synonyms).
'spin'+'out'='SPIN OUT'
Can you help me to learn more?
(Other definitions for spin out that I've seen before include "keep going longer" , "Message for fast bowlers only" , "Prolong" , "jaunt in car" .)