Crossword Genius

One drunkard turns to espy another (7)

Ross

I believe the answer is:

tosspot

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'one drunkard turns to espy another' is the definition.
I can't tell whether this defines the answer.

'one drunkard turns to espy' is the wordplay.
'one drunkard' becomes 'sot' (sot can mean a drunken person).
'turns' says the letters should be written in reverse.
'to espy' becomes 'spot' ('spot' can be a synonym of 'espy').
'sot' back-to-front is 'tos'.
'tos'+'spot'='TOSSPOT'

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(Other definitions for tosspot that I've seen before include "One drinker" , "One drunkard" , "Drunk (informal)" , "Habitual drinker" , "Fool" .)

I've seen this clue in The Globe and Mail.
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