Crossword Genius

"X”, a man lately honoured in many countries (7,7)

Ross

I believe the answer is:

unknown soldier

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

'x' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'a man lately honoured in many countries' is the wordplay.
I cannot really see how this works, but
'man' could be 'soldier' (soldier is a kind of man) and 'soldier' is located in the answer.
The remaining letters 'unknown' is a valid word 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?

I've seen this clue in The Times.
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