It's brilliant being the chap in charge! (5)

I believe the answer is:

super

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'it's brilliant' is the definition.
(I've seen this before)

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

(Other definitions for super that I've seen before include "Fantastic" , "Topnotch, terrific" , "Prefix meaning over-excellent!" , "Gushily great, excellent" , "senior cop" .)

I've seen this clue in the Evening Standard.

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