Be curiously intrusive (5)

I believe the answer is:

snoop

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But I can't explain it at all! Could you help me understand?

(Other definitions for snoop that I've seen before include "-- Dogg, US rapper; spy" , "Stick one's nose in" , "Informally, pry inquisitively" , "Be nosy" , "Furtively investigate" .)

I've seen this clue in the Evening Standard.

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