Revel like rioters somehow (7)
I believe the answer is:
roister
'revel' is the definition.
(both can mean to party)
'rioters somehow' is the wordplay.
'somehow' indicates an anagram.
'rioters' with letters rearranged gives 'ROISTER'.
'like' is the link.
(Other definitions for roister that I've seen before include "Enfold" , "Act boisterously" , "Engage in party activity" , "Noisy reveller" , "bluster" .)