Turned handle of old adversary (6)
I believe the answer is:
foeman
'old adversary' is the definition.
'foeman' can be an answer for 'adversary' (thesaurus). I'm not certain of the 'old' bit.
'turned handle of' is the wordplay.
'turned' shows that the letters should be reversed in order.
'handle' becomes 'name' (handle can mean a name or nickname).
'name'+'of'='nameof'
'nameof' in reverse letter order is 'FOEMAN'.
Can you help me to learn more?
(Other definitions for foeman that I've seen before include "Enemy in war" , "Archaic male enemy" .)