Cheese on conventional board game property (9,6)

I believe the answer is:

leicester square

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'board game property' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'cheese on conventional' is the wordplay.
'cheese' becomes 'leicester' (I've seen this before).
'on conventional' becomes 'square' (similar in meaning. I am not sure about the 'on' bit.).
'leicester'+'square'='LEICESTER SQUARE'

Can you help me to learn more?

(Other definitions for leicester square that I've seen before include "London film premiere location" , "royal premiere venue" .)

I've seen this clue in The Telegraph.

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