Crossword Genius

Busy? Not working, with time for fun principally! (9)


I believe the answer is:


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'busy?' is the definition.
(busy can informally mean a police officer)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for detective that I've seen before include "Investigating policeman" , "such as Chesterton's father" , "Sleuth" , "Criminal investigator" , "police officer" .)

I've seen this clue in The Telegraph.
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