Cats, say, not usually considered this when yowling? (7)

I believe the answer is:

musical

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'cats say' is the definition.
(Cats is an Andrew Lloyd Webber musical)

I don't understand the rest of the clue.

(Other definitions for musical that I've seen before include "Annie or Mame, say" , "Form of theatre" , "eg Chicago" , "Melodious" , "Oklahoma, say" .)

I've seen this clue in The Times.

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