Crossword Genius

Church on island visited by a very loud bird (9)

Ross

I believe the answer is:

chaffinch

I'm a little stuck... Click here to teach me more about this clue!

'bird' is the definition.
(chaffinch is a kind of bird)

'church on island visited by a very loud' is the wordplay.
'church on' becomes 'ch' (common abbreviation. I am not sure about the 'on' bit.**).
'island' becomes 'inch' (I've seen this before).
'visited by' is an insertion indicator.
'very loud' becomes 'ff' (musical abbreviation).
'ch'+'inch'='chinch'
'a'+'ff'='aff'
'chinch' enclosing 'aff' is 'CHAFFINCH'.

Can you help me to learn more?

(Other definitions for chaffinch that I've seen before include "Singer" , "Common bird" , "European bird with black and white wings" , "Garden bird" , "Small European songbird" .)

I've seen this clue in The Independent.
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