Certain stars removed from star billing upset (5)
I believe the answer is:
libra
'certain stars' is the definition.
(Libra is a constellation)
'removed from star billing upset' is the wordplay.
'removed from' indicates the answer is hidden within the clue.
'upset' shows that the letters should be reversed in order.
'arbil' can be found hidden inside 'star billing'.
'arbil' backwards is 'LIBRA'.
(Other definitions for libra that I've seen before include "House" , "Zodiacal sign" , "Seventh sign of the Zodiac" , "The Scales in astrology" , "Old pound" .)