Break free (6)
I believe the answer is:
escape
'break free' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for escape that I've seen before include "Get away from the strange EC peas" , "Get away from confinement" , "has to fly" , "Elude; break free" , "Run away from confinement" .)