Live group getting besieged (5)
I believe the answer is:
beset
'besieged' is the definition.
(thesaurus)
'live group getting' is the wordplay.
'live' becomes 'be' ('be' can be a synonym of 'live').
'group' becomes 'set' (set is a kind of group**).
'getting' says to put letters next to each other.
'be'+'set'='BESET'
(Other definitions for beset that I've seen before include "Press" , "Surrounded, under siege" , "dog" , "Encircled, attacked" , "Hemmed in or surrounded" .)