Crossword Genius

Midlander starting to bet before card game announced (7)

Ross

I believe the answer is:

brummie

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

'midlander' is the definition.
(I've seen this before)

'starting to bet before card game announced' is the wordplay.
I cannot quite see how this works, but
'before' could be 'e' (I've seen this in other clues) and 'e' is located in the answer.
'game' could be 'rum' (rum is a kind of game) and 'rum' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for brummie that I've seen before include "Person from Birmingham" , "Ozzy Osbourne perhaps" , "Native of Aston, perhaps" , "Urbanite of the Midlands" , "As a city dweller" .)

I've seen this clue in The Guardian.
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