Crossword Genius

Good grounds for holding sports (6)

Ross

I believe the answer is:

stadia

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

'good grounds' is the definition.
'stadia' can be an answer for 'grounds' (I've seen this before). I'm unsure of the 'good' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for stadia that I've seen before include "Big venues" , "Bowls" , "major venues" , "Athletics grounds" , "Sports arenas" .)

I've seen this clue in The Globe and Mail and The Irish News.
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