Crossword Genius

Old revolutionary buried up in the cenotaph (4)

Ross

I believe the answer is:

tone

I'm a little stuck... Click here to teach me more about this clue!

'old revolutionary buried' is the definition.
I can't judge whether this definition defines the answer.

'up in the cenotaph' is the wordplay.
'up' says the letters should be written backwards (in down clue: letters go upwards).
'in' indicates the answer is hidden within the clue.
'enot' can be found hidden inside 'cenotaph'.
'enot' back-to-front is 'TONE'.

Can you help me to learn more?

(Other definitions for tone that I've seen before include "A pitch of note" , "Sound - style" , "Quality of sound, etc" , "Quality of a musical or vocal sound" , "Shade" .)

I've seen this clue in the Irish Times.
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