Lights up for celebrities? (5)
I believe the answer is:
stars
'for celebrities?' is the definition.
(star can mean a famous person)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for stars that I've seen before include "Celestial bodies of hot gases" , "Leading actors" , "''What is the ...? What is the ...? '' (Juno and the Paycock)" , "Horoscope (colloq.)" , "Celebs - constellation" .)