Redesigned gateway? I don't believe it! (3,4)
I believe the answer is:
get away
'i don't believe it' is the definition.
I can't tell whether this defines the answer.
'redesigned gateway?' is the wordplay.
'redesigned' indicates anagramming the letters.
'gateway' is an anagram of 'GET-AWAY'.
Can you help me to learn more?
(Other definitions for get away that I've seen before include "The car that provides escape for criminal" , "Escape; come off it!" , "take a holiday" , "Escape; short holiday" , "Escape after crime" .)