Refined film about strange angel (7)
I believe the answer is:
elegant
'refined' is the definition.
(similar in meaning)
'film about strange angel' is the wordplay.
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'about' means one lot of letters goes inside another.
'strange' is an anagram indicator.
'angel' anagrammed gives 'legan'.
'et' going around 'legan' is 'ELEGANT'.
(Other definitions for elegant that I've seen before include "luxurious style?" , "A gentle sort of stylish appearance" , "Refined and dignified in appearance" , "Graceful - refined" , "Modish" .)