Crossword Genius

Pulls out expert in beer, mostly after setback (7)

Ross

I believe the answer is:

uproots

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

'pulls' is the definition.
The definition and answer can be both to do with contact as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?

'out expert in beer mostly after setback' is the wordplay.
'out expert' becomes 'pro' (short for professional. I am not sure about the 'out' bit.).
'in' is an insertion indicator.
'beer' becomes 'stout' (type of beer).
'mostly' means to remove the last letter.
'after setback' is a reversal indicator.
'stout' with its last letter taken away is 'stou'.
'stou' back-to-front is 'uots'.
'pro' inserted inside 'uots' is 'UPROOTS'.

Can you help me to learn more?

(Other definitions for uproots that I've seen before include "Eradicates" , "Displaces -- or put so (anag)" , "tears out of bed" , "Tears from natural habitat or ground" , "Completely destroys" .)

I've seen this clue in The Independent.
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