Sully it, moving energetically (7)
I believe the answer is:
lustily
'energetically' is the definition.
(thesaurus)
'sully it moving' is the wordplay.
'moving' indicates anagramming the letters (letters are moved around).
'sully'+'it'='sullyit'
'sullyit' anagrammed gives 'LUSTILY'.
(Other definitions for lustily that I've seen before include "With all one's might" , "Vigorously, strongly" , "In a vigorous way" , "at the top of her voice?" .)