The gang sound a bit crude (4)

I believe the answer is:

crew

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'the gang' is the definition.
('crew' can be a synonym of 'gang')

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for crew that I've seen before include "Train team" , "Was exultant" , "On board first (4)" , "Personnel (on ship perhaps?)" , "They operate ships or aircraft, say" .)

I've seen this clue in the Evening Standard.

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