Mafia kingpin (4)

I believe the answer is:

capo

'mafia kingpin' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for capo that I've seen before include "crime boss" , "something to grip neck tightly" , "Mafia boss" , "Movable bridge" , "Mafia chief?" .)

I've seen this clue in the King Feature Syndicate, the Wall Street Journal, the Universal and the Thinks.com.

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