Revolt is welcomed by group (6)
I believe the answer is:
rising
'revolt' is the definition.
(I know that revolt can be written as rising)
'is welcomed by group' is the wordplay.
'welcomed by' is an insertion indicator (letters welcomed inside).
'group' becomes 'ring' (a ring is a criminal organisation).
'is' put within 'ring' is 'RISING'.
(Other definitions for rising that I've seen before include "Ascension" , "Armed revolt against authority" , "Moving upwards" , "Hill" , "Upwardly mobile" .)