Movie star involved in Old West action! (5,8)
I believe the answer is:
clint eastwood
'movie star' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'involved in old west action' is the wordplay.
'involved in' indicates an anagram (involved can mean complex or confusing).
'old'+'west'+'action'='oldwestaction'
'oldwestaction' is an anagram of 'CLINT EASTWOOD'.
Can you help me to learn more?
(Other definitions for clint eastwood that I've seen before include "US actor - Eliot downcast (anag)" , "Old West action (anag) - US film actor and director" .)