Here is the clue.
What crazy, bloodthirsty creature remains? (5 letters)
EDIT I added the word 'crazy'. Apologies that I missed this out before.
Please use typical cryptic crossword strategies to solve this but some lateral thinking may be required.
I have made this open-ended so, in the unlikely event that there are multiple valid answers then the one that gets the most up-votes in the next couple of days will be accepted.
If you are not sure that your answer is correct, then it isn't! If you get the intended solution then you will be 100% certain of the reason.
The answer is a single word. Please give the word and explain the cryptic techniques you used. I used two very straightforward ones.
Don't ignore the lateral thinking tag.
Make sure you use all the information provided.
No technical knowledge is needed (apart from a familiarity with cryptic crosswords) and this is a word that I'm sure everyone will know.