Managed a second joint, a religious office (10)
I believe the answer is:
deaconship
'a religious office' is the definition.
The definition suggests a singular noun which matches the answer.
'managed a second joint' is the wordplay.
'managed' indicates anagramming the letters.
'joint' becomes 'hip' (part of body).
'a'+'second'='asecond'
'asecond' with letters rearranged gives 'deacons'.
'deacons'+'hip'='DEACONSHIP'
Can you help me to learn more?
(Another definition for deaconship that I've seen is " position for junior minister".)