Crossword Genius

How to obtain funds unduly from extra lottery? (8)

Ross

I believe the answer is:

overdraw

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'how to obtain funds unduly' is the definition.
I can't tell whether this definition defines the answer.

'extra lottery?' is the wordplay.
'extra' becomes 'over' (both can mean left over).
'lottery?' becomes 'draw' (I've seen this in other clues).
'over'+'draw'='OVERDRAW'

'from' is the link.

Can you help me to learn more?

(Other definitions for overdraw that I've seen before include "Go into the red" , "Get into the red" , "Stretch the truth" , "incur debt" , "Use more money than you have in the bank" .)

I've seen this clue in The Independent.
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