Monarch no longer to block vote against old tyrant (4)
I believe the answer is:
nero
'tyrant' is the definition.
(Nero was a Roman tyrant)
'monarch no longer to block vote against old' is the wordplay.
I cannot really see how this works, but
'monarch' could be 'er' (abbreviation for Elizabeth Regina, British Queen) and 'er' is found in the answer.
'no' could be 'o' (O resembles 0) and 'o' is found in the answer.
A single letter 'n' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for nero that I've seen before include "Roman tyrant" , "Emperor, 'burnt' Rome" , "Emperor said to have started the fire that destroyed Rome" , "Roman arsonist and fiddler" , "Imperial Roman fiddler" .)