Film villain is curious Old Testament character (6)
I believe the answer is:
oddjob
'film villain' is the definition.
(James Bond villain)
'curious old testament character' is the wordplay.
'curious' becomes 'odd' (I've seen this before).
'old testament character' becomes 'job'.
'odd'+'job'='ODDJOB'
'is' is the link.
(Other definitions for oddjob that I've seen before include "casual work" , "Villainous character" , "henchman in film" .)