One revealing potential Top Ten starlet? (6,7)
I believe the answer is:
talent spotter
'one' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'potential top ten starlet?' is the wordplay.
'potential' is an anagram indicator (another potential order of the letters).
'top'+'ten'+'starlet'='toptenstarlet'
'toptenstarlet' is an anagram of 'TALENT-SPOTTER'.
'revealing' acts as a link.
(Other definitions for talent spotter that I've seen before include "One looking for good new performers" , "Show business scout" , "Agent looking for the gifted" .)