Star skater is spoilt (8)
I believe the answer is:
asterisk
'star' is the definition.
(I know that star can be written as asterisk)
'skater is spoilt' is the wordplay.
'spoilt' is an anagram indicator.
'skater'+'is'='skateris'
'skateris' is an anagram of 'ASTERISK'.
(Other definitions for asterisk that I've seen before include "Character drawing attention to footnote" , "Star-shape on the page" , "Footnote marker" , "Sarkiest (Anag)" , "Star-like symbol as reference mark" .)