Possibly reunite the entourage (7)
I believe the answer is:
retinue
'the entourage' is the definition.
(synonyms)
'possibly reunite' is the wordplay.
'possibly' indicates anagramming the letters.
'reunite' with letters rearranged gives 'RETINUE'.
(Other definitions for retinue that I've seen before include "Personal staff" , "Train; attendants" , "Group of servants with important person" , "Body of aides" , "Body of attendants" .)