Almost furious with new husband-to-be? Relax here (6,4)
I believe the answer is:
living room
'relax here' is the definition.
(room to relax in)
'almost furious with new husband-to-be?' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'furious' becomes 'livid' (both can mean very angry).
'with' means one lot of letters go next to another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'husband-to-be?' becomes 'groom' (man due to get married).
'livid' with its last letter taken off is 'livi'.
'livi'+'n'+'groom'='LIVING-ROOM'
(Other definitions for living room that I've seen before include "Home space" , "Area in home for relaxation" .)