Runaway gets free movement holding universal keys (7)
I believe the answer is:
refugee
'runaway' is the definition.
(thesaurus)
'free movement holding universal keys' is the wordplay.
'movement' indicates an anagram (letters move around).
'holding' indicates putting letters inside.
'universal' becomes 'U' (film certificate).
'keys' becomes 'ge' (I can't explain this - if you can you should believe this answer much more).
'free' anagrammed gives 'refe'.
'u'+'ge'='uge'
'refe' going around 'uge' is 'REFUGEE'.
'gets' is the link.
Can you help me to learn more?
(Other definitions for refugee that I've seen before include "Person seeking asylum in another country" , "One fleeing from persecution" , "One fleeing disaster" , "War-forced migrant" , "One fleeing troubles" .)