Old Queen having radical leader of Trotskyites imprisoned and punished for beliefs (8)

I believe the answer is:

martyred

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

'leader of trotskyites imprisoned and punished for beliefs' is the definition.
I can't judge whether this definition defines the answer.

'old queen having radical' is the wordplay.
'old queen' becomes 'marty' (I can't explain this - if you can you should believe this answer much more).
'having' is a charade indicator (letters next to each other).
'radical' becomes 'red' (I've seen this in another clue).
'marty'+'red'='MARTYRED'

Can you help me to learn more?

I've seen this clue in The Telegraph.

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