Feel free to run away (4)
I believe the answer is:
flee
'run away' is the definition.
(to flee is to run away)
'feel free' is the wordplay.
'free' indicates anagramming the letters.
'feel' is an anagram of 'FLEE'.
'to' is the link.
(Other definitions for flee that I've seen before include "Maybe escape" , "Run (from danger)" , "head for the hills" , "retreat" , "Leave" .)