Crossword Genius

Drinking booze? So then sip to get drunk! (2,3,4)

Ross

I believe the answer is:

on the piss

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'drinking booze?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'so then sip to get drunk' is the wordplay.
'to get drunk' is an anagram indicator.
'so'+'then'+'sip'='sothensip'
'sothensip' is an anagram of 'ON THE PISS'.

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