I'm ready to avenge the conservatives (5)
I believe the answer is:
right
'conservatives' is the definition.
(right-wing people)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for right that I've seen before include "''The customer is always .....''" , "Most favourable" , "Genuine" , "A person is entitled to it" , "Conservative - correct" .)