Crossword Genius

Scrubs up? (5)

Ross

I believe the answer is:

astir

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'up?' is the definition.
(I know that up can be written as astir)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for astir that I've seen before include "Starting to move" , "This isn't still" , "Excited; out of bed" , "In a state of movement" , "abroad" .)

I've seen this clue in The Guardian.
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