Eden tempter's nasty present (7)
I believe the answer is:
serpent
'eden tempter's' is the definition.
(I've seen this in another clue)
'nasty present' is the wordplay.
'nasty' indicates an anagram (a nasty or wrong spelling).
'present' is an anagram of 'SERPENT'.
(Other definitions for serpent that I've seen before include "Large snake; sly person" , "Large snake, dragon" , "Devil of a snake" , "Malicious person" , "Present (anag.)" .)