Canoodle on promontory, finding wading bird (9)
I believe the answer is:
spoonbill
'wading bird' is the definition.
(spoonbill is a kind of wading bird)
'canoodle on promontory' is the wordplay.
'canoodle' becomes 'spoon' (I've seen this before).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'promontory' becomes 'bill' (I have seen 'Narrow promontory' mean 'bill' so perhaps 'promontory' could also mean 'bill').
'spoon'+'bill'='SPOONBILL'
'finding' is the link.
(Other definitions for spoonbill that I've seen before include "flyer" , "one rarely seen in the UK?" , "Tall wading bird" , "Wader" , "Large wading bird" .)