Crossword Genius

Staggers in part of Brum and wants whiskey to go (10)

Ross

I believe the answer is:

astonishes

I'm a little stuck... Click here to teach me more about this clue!

'staggers' is the definition.
(I've seen this in another clue)

'part of brum and wants whiskey to go' is the wordplay.
I cannot really see how this works, but
'part' could be 'aston' (I have seen 'part of Birmingham' mean 'aston' so perhaps 'part' could also mean 'aston') and 'aston' is present in the answer.
The remaining letters 'ishes' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'in' is the link.

Can you help me to learn more?

I've seen this clue in The Independent.
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