Crossword Genius

One person of many coming to a sticky end (3)

Ross

I believe the answer is:

man

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'one' is the definition.
(thesaurus)

'person of many coming to a sticky end' is the wordplay.
I cannot quite see how this works, but
'many' could be 'm' (Roman numeral for a thousand) and 'm' is found in the answer.
'a' could be 'an' and 'an' is present in the answer.
No letters remain.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for man that I've seen before include "Adult human male" , "knight, perhaps?" , "The most destructive and polluting animal" , "Homo sapiens" , "See 24" .)

I've seen this clue in the Evening Standard.
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