Accompany group of women visiting barbarian (2,4)
I believe the answer is:
go with
'accompany' is the definition.
(synonyms)
'group of women visiting barbarian' is the wordplay.
'group of women' becomes 'WI' (Women's Institute).
'visiting' indicates putting letters inside.
'barbarian' becomes 'goth' (synonyms).
'wi' placed into 'goth' is 'GO WITH'.
(Other definitions for go with that I've seen before include "Accompany" , "Match" , "date" .)