Pound for one beer starts to see excited language at the bar (8)
I believe the answer is:
legalese
'language at the bar' is the definition.
I can't tell whether this defines the answer.
'pound for one beer starts to see excited' is the wordplay.
'pound' becomes 'L' (the pound sign is based on an L).
'for one' becomes 'eg' (both can mean 'for example').
'beer' becomes 'ale' (type of beer).
'starts to' suggests taking the first letters.
The first letters of 'see excited' is 'se'.
'l'+'eg'+'ale'+'se'='LEGALESE'
Can you help me to learn more?
(Other definitions for legalese that I've seen before include "Bar talk" , "such language at the bar!" , "Solicitor's jargon" , "barman's peculiar words" , "Special terms" .)