A commotion that gets you up (5)

I believe the answer is:

astir

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'up' is the definition.
(synonyms)

'a commotion' is the wordplay.
'commotion' becomes 'stir' (stir is a kind of commotion).
'a'+'stir'='ASTIR'

'that gets you' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for astir that I've seen before include "This isn't still" , "Out of bed or on the move" , "abroad" , "Busy" , "in the land of the living" .)

I've seen this clue in the Evening Standard.

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