No port drunk quickly (6)
I believe the answer is:
pronto
'quickly' is the definition.
(I've seen this in another clue)
'no port drunk' is the wordplay.
'drunk' is an anagram indicator.
'no'+'port'='noport'
'noport' is an anagram of 'PRONTO'.
(Other definitions for pronto that I've seen before include "Right away, quickly" , "Quickly, without delay" , "Right now, immediately" , "Quickly, immediately" , "Right now, amigo" .)