Those starred in a movie? (4)
I believe the answer is:
wars
'those starred' is the definition.
I can't tell whether this definition defines the answer.
'movie?' is the wordplay.
I cannot really see how this works, but
'movie?' could be 'w' (W, film about George W Bush) and 'w' is found in the answer.
The remaining letters 'ars' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'in a' is the link.
Can you help me to learn more?
(Other definitions for wars that I've seen before include "See 8" , "Battles" , "- - of the Roses" , "Armed conflicts against enemies" .)