Judge a right vampire? (7)
I believe the answer is:
arbiter
'judge' is the definition.
(I know that arbiter is a type of judge)
'a right vampire?' is the wordplay.
'a right' becomes 'ar' (I've seen this in other clues).
'vampire?' becomes 'biter' (I can't justify this - if you can you should give a lot more credence to this answer).
'ar'+'biter'='ARBITER'
Can you help me to learn more?
(Other definitions for arbiter that I've seen before include "Rear bit (anag.)" , "One settling disputes" , "One appointed to settle a dispute" , "Decision maker" , "He'll decide" .)