Go-between in an intrigue (7)
I believe the answer is:
liaison
I believe this is a double definition.
'go-between' is the first definition.
(thesaurus)
'an intrigue' is the second definition.
(I've seen this before)
'in' acts as a link.
(Other definitions for liaison that I've seen before include "Channel of communication" , "Intermediary" , "Mediator" , "Association" , "Amour; communication" .)