Crib accommodates American boss (7)

I believe the answer is:

manager

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'boss' is the definition.
(I know that boss can be written as manager)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for manager that I've seen before include "Person in charge of staff" , "Coach" , "One in charge of sports team" , "who sits on the bench?" , "executive position" .)

I've seen this clue in The Sun.

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