One in a leading role (4)
I believe the answer is:
star
(Other definitions for star that I've seen before include "Asterisk" , "Famous entertainer" , "Cult sci-fi film" , "Twinkling celestial body" , "Shiner" .)
I believe the answer is:
star
(Other definitions for star that I've seen before include "Asterisk" , "Famous entertainer" , "Cult sci-fi film" , "Twinkling celestial body" , "Shiner" .)