Go to meet German girl somewhere for a little drink? (4,5)

'a little drink?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'go to meet german girl somewhere' is the wordplay.
I cannot quite see how this works, but
'go' could be 'shot' (I've seen this before) and 'shot' is found in the answer.
'german' could be 'g' (abbreviation) and 'g' is found in the answer.
'girl' could be 'lass' (lass can informally mean a girl) and 'lass' is present in the answer.
No letters remain.
This explanation may well be incorrect...

'for' is the link.

Can you help me to learn more?