Without energy offering to remove vulture (7)
I believe the answer is:
griffon
'vulture' is the definition.
(griffon is a kind of vulture)
'without energy offering to remove' is the wordplay.
'without' suggests deleting specific letters.
'energy' becomes 'e' (physics symbol as in E=mc2).
'to remove' is an anagram indicator (move the letters again).
'offering' with 'e' removed is 'offring'.
'offring' is an anagram of 'GRIFFON'.
(Other definitions for griffon that I've seen before include "Bird" , "breed of dog" , "dog? A monster" .)