Homeless animal's style of singing captivates carrier (5,3)

I believe the answer is:

stray cat

'homeless animal's' is the definition.

'style of singing captivates carrier' is the wordplay.
'style of singing' becomes 'scat' (as in jazz scatting).
'captivates' indicates putting letters inside.
'carrier' becomes 'tray' (I've seen this before).
'scat' enclosing 'tray' is 'STRAY CAT'.

I've seen this clue in The Guardian.

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