Briefly at home, separate to get over husband (2,5)
I believe the answer is:
in short
'briefly' is the definition.
(I know that briefly can be written as in short)
'home separate to get over husband' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'separate' becomes 'sort' (synonyms).
'to get over' is an insertion indicator.
'husband' becomes 'h' (abbreviation).
'sort' enclosing 'h' is 'short'.
'in'+'short'='IN SHORT'
'at' is the link.
(Other definitions for in short that I've seen before include "To sum up, briefly" , "to be brief" , "Concisely" .)