Not to be confused with a stray? (4)

I believe the answer is:

waif

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'a stray?' is the definition.
(thesaurus)

I can't explain the remainder of the clue.

(Other definitions for waif that I've seen before include "poor child" , "neglected issue" , "Orphan" , "Be incongruous" , "Neglected, homeless child" .)

I've seen this clue in the Evening Standard.

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