Arrive rapidly around brook (5)

I believe the answer is:

river

'brook' is the definition.
(thesaurus)

'arrive rapidly around' is the wordplay.
'around' indicates a hidden word.
'RIVER' is hidden within 'arrive rapidly'.

(Other definitions for river that I've seen before include "Large flow of liquid" , "Flowing water" , "Eg, Trent" , "It flows" , "One splits" .)

I've seen this clue in The Mirror.

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