Home, compact in size, for the richer (2,6)
I believe the answer is:
in pocket
'the richer' is the definition.
(I've seen this before)
'home compact in size' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'compact in size' becomes 'pocket' (eg a pocket calculator).
'in'+'pocket'='IN POCKET'
'for' acts as a link.
(Other definitions for in pocket that I've seen before include "Showing a profit" , "Richer after deal" , "Where skilful potter gets" , "Where skilful potter should get" , "Having gained money on a transaction" .)