Now no port in storm (6)
I believe the answer is:
pronto
'now' is the definition.
(thesaurus)
'no port in storm' is the wordplay.
'in storm' indicates an anagram (I've seen this in other clues).
'no'+'port'='noport'
'noport' is an anagram of 'PRONTO'.
(Other definitions for pronto that I've seen before include "Quickly, amigo" , "Proton (anag.)" , "Immediately, amigo" , "Right now, amigo" , "Promptly, without delay" .)