Sit on benches at indoor arenas (6,6)

'indoor arenas' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps you can see an association between them that I don't see?

'sit on benches' is the wordplay.
I cannot quite see how this works, but
'sit on' could be 'quash' (I've seen this in another clue) and 'quash' is located in the answer.
This explanation may well be incorrect...

'at' is the link.

Can you help me to learn more?