Escape? I don’t believe you! (3,4)
I believe the answer is:
get away
I believe this clue is a double definition.
'escape?' is the first definition.
(synonyms)
'i don't believe you' is the second definition.
(Other definitions for get away that I've seen before include "take a holiday" , "Escape; short holiday" , "Never" , "Escape after crime" , "The car that provides escape for criminal" .)