Unusually suave porn star (9)
I believe the answer is:
supernova
'star' is the definition.
(supernova is a kind of star)
'unusually suave porn' is the wordplay.
'unusually' is an anagram indicator.
'suave'+'porn'='suaveporn'
'suaveporn' with letters rearranged gives 'SUPERNOVA'.
(Other definitions for supernova that I've seen before include "Exploding star that becomes extremely luminous" , "Star in decline" , "Exploding star that becomes much brighter" , "The sort of star" , "cosmic explosion" .)