Estate manager stealing diamonds from The Confessor (7)
I believe the answer is:
steward
'estate manager' is the definition.
(I've seen this in another clue)
'stealing diamonds from the confessor' is the wordplay.
'stealing' becomes 'st' (I can't justify this - if you can you should give a lot more credence to this answer).
'diamonds' becomes 'd' (abbreviation for the card suit diamonds).
'from' indicates named letters should be taken away.
'the confessor' becomes 'edward' (I've seen this in another clue).
'edward' with 'd' taken away is 'eward'.
'st'+'eward'='STEWARD'
Can you help me to learn more?
(Other definitions for steward that I've seen before include "Administrator, manager, or waiter" , "Shipboard attendant" , "Overseer" , "Ship's officer" , "Caretaker" .)