Sailor playing card (4)

I believe the answer is:

jack

This clue is a double definition.

'sailor' is the first definition.
(thesaurus)

'playing card' is the second definition.
(jack is a kind of playing card)

(Other definitions for jack that I've seen before include "Jill's companion" , "-- Sprat; -- Horner" , "Device for raising car to remove wheel" , "Card -- raiser" , "Tunic for a soldier" .)

I've seen this clue in The Times.

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