Zealot to rock around (5)
I believe the answer is:
bigot
'zealot' is the definition.
(bigot is a kind of zealot)
'to rock around' is the wordplay.
'rock' becomes 'gib' (both are nicknames for Gibraltar).
'around' is a reversal indicator.
'to'+'gib'='togib'
'togib' reversed gives 'BIGOT'.
(Other definitions for bigot that I've seen before include "Dogmatist" , "Intolerant type" , "sectarian" , "One is prejudiced and intolerant" , "Intolerantly prejudiced person" .)