Crossword Genius

Sudden burst of activity (4)

Ross

I think it could be either:

Which length description are you looking for?:

4

6

'sudden burst of activity' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for rush that I've seen before include "Move with haste" , "Race" , "Marsh plant - fly" , "Be too hasty or too fast" , "Overcharge" .)

I've seen this clue in the LA Times and The Guardian.
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