Renegade having a spot, perhaps, to eat, out (8)
I believe the answer is:
apostate
'renegade' is the definition.
(synonyms)
'a spot perhaps to eat out' is the wordplay.
'perhaps' is an anagram indicator.
'to' is a charade indicator (letters next to each other).
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'spot' is an anagram of 'post'.
'eat' is an anagram of 'ate'.
'a'+'post'+'ate'='APOSTATE'
'having' acts as a link.
(Other definitions for apostate that I've seen before include "Deserter" , "Someone who abandons a belief" , "Renegade" , "One renouncing a belief" , "Turncoat" .)