Bounty will reveal the Reverend’s bird (9)
I believe the answer is:
spoonbill
'the reverend's bird' is the definition.
'spoonbill' can be an answer for 'bird' (spoonbill is a kind of bird). I'm not certain of the 'the reverend's' bit.
'bounty will' is the wordplay.
'bounty' becomes 'spoon' (I can't justify this - if you can you should give a lot more credence to this answer).
'will' becomes 'bill'.
'spoon'+'bill'='SPOONBILL'
'reveal' is the link.
Can you help me to learn more?
(Other definitions for spoonbill that I've seen before include "flyer" , "Wading bird with broad beak" , "one rarely seen in the UK?" , "Wader" , "Tall wading bird" .)