Leading performer you can't see any day (4)
I believe the answer is:
star
'leading performer' is the definition.
(I've seen this in another clue)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for star that I've seen before include "White blaze on a horse's forehead" , "Distant sun" , "Major" , "Five-pointed celestial body" , "Hollywood figure" .)