A blow for Conservatives (5)
I believe the answer is:
right
'conservatives' is the definition.
(right-wing people)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for right that I've seen before include "Correct - starboard" , "Not left" , "Spot-on" , "Morally good; rectify" , "Authority - one hand" .)