Quick pint emptied after school dance in America (6)
I believe the answer is:
prompt
'quick' is the definition.
(synonyms)
'pint emptied after school dance in america' is the wordplay.
I cannot really understand how this works, but
'pint' could be 'pt' (abbreviation) and 'pt' is found in the answer.
'dance' could be 'prom' (prom is a kind of dance) and 'prom' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for prompt that I've seen before include "Quick - cue" , "Immediate - supply forgotten words" , "Urge - done without delay" , "Spurs do this" , "On the dot" .)