Wildly amused gorgon! (6)
I believe the answer is:
medusa
'gorgon' is the definition.
(I know that Medusa is a type of gorgon)
'wildly amused' is the wordplay.
'wildly' is an anagram indicator.
'amused' is an anagram of 'MEDUSA'.
(Other definitions for medusa that I've seen before include "Petrifying woman" , "Mythological gorgon" , "Amused by the mythical gorgon?" , "all her visitors got stoned" , "Amused like Greek Gorgon" .)