Turncoat given a job at head of enterprise (8)
I believe the answer is:
apostate
'turncoat' is the definition.
(thesaurus)
'a job at head of enterprise' is the wordplay.
'job' becomes 'post' (post is a kind of job).
'head of' says to take the initial letters.
The initial letter of 'enterprise' is 'e'.
'a'+'post'+'at'+'e'='APOSTATE'
'given' is the link.
(Other definitions for apostate that I've seen before include "Turncoat" , "One no longer believing" , "Someone who abandons a belief" , "Person abandoning their religion" , "Religious renouncer" .)