Check out characters embraced by rising matinee idol (3)
I believe the answer is:
die
'check out' is the definition.
('check out' can informally mean to die)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for die that I've seen before include "Expire" , "Pass away" , "Stop living" , "One spotted" , "Mould; become extinct" .)