Get out with this key (6)
I believe the answer is:
escape
This clue is a triple definition!
'get' is the first definition.
(I know that escape is a type of get)
'out' is the second definition.
(thesaurus)
'with' acts as a link.
'this key' is the third definition.
(key on a keyboard)
(Other definitions for escape that I've seen before include "Get out of captivity, go over the wall" , "Duck" , "Abscond, flee" , "Do a runner" , "Break loose - flight" .)