Right to run away? (5)
I believe the answer is:
legit
This clue is a double definition.
'right' is the first definition.
(both can mean legal)
'run away?' is the second definition.
(as in 'leg it')
'to' is the link.
(Other definitions for legit that I've seen before include "Authorised" , "acceptable" , "ok!" , "Run away - above board (colloq)" , "Briefly in accordance with law or rules" .)