Songbird which circles Scottish island (8)

I believe the answer is:

whinchat

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'songbird' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'which circles scottish island' is the wordplay.
'which' becomes 'what' (I've seen this in other clues).
'circles' indicates putting letters inside.
'scottish island' becomes 'inch' (I've seen this before).
'what' placed around 'inch' is 'WHINCHAT'.

Can you help me to learn more?

I've seen this clue in The Times.

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