Gumshoe (7,3)

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7,3

10*

private eye

'gumshoe' is the definition.
(thesaurus)

This is all the clue.

(Other definitions for private eye that I've seen before include "Periodical" , "Satirical magazine - undercover detective" , "Spade, say" , "50 today" , "supplement to work of police?" .)

I've seen this clue in The Guardian.

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