Crossword Genius

One of these, party 2 (6)

Ross

I believe the answer is:

cluedo

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'2' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

'one of these party' is the wordplay.
'one of' becomes 'clue' (I can't explain this - if you can you should give a lot more credence to this answer).
'these party' becomes 'do' (do is a kind of party).
'clue'+'do'='CLUEDO'

Can you help me to learn more?

(Other definitions for cluedo that I've seen before include "Detective game" , "Murder mystery board game" .)

I've seen this clue in The Guardian.
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