Husband joins huge woman in cheer (7)
I believe the answer is:
hosanna
'cheer' is the definition.
(thesaurus)
'husband joins huge woman' is the wordplay.
'husband' becomes 'h' (abbreviation).
'joins' means one lot of letters go next to another.
'huge' becomes 'os' (abbreviation for outsize).
'woman' becomes 'anna' ().
'h'+'os'+'anna'='HOSANNA'
'in' is the link.
(Other definitions for hosanna that I've seen before include "A cry of adoration to God" , "shout in adoration" , "exclamation of joy" , "Cry of religious adoration, often in the highest" , "A cry of praise to God, from Hebrew" .)