Crossword Genius

Where there are grounds, they support the supporters (6)

Ross

I believe the answer is:

stands

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'where there are grounds they' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'support the supporters' is the wordplay.
'support' becomes 'stand' (stand is a kind of support).
'the supporters' becomes 's' (this could be a standard abbreviation which I don't know about).
'stand'+'s'='STANDS'

Can you help me to learn more?

(Other definitions for stands that I've seen before include "Tiered seats in stadiums" , "Puts up with" , "Gets to one's feet" , "Stadium seats" , "doesn't change" .)

I've seen this clue in the Evening Standard.
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