Crossword Genius

Speaking to audience about what house stumps are for? (7,3,5)

Ross

I believe the answer is:

holding the floor

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

'speaking to audience about' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'house stumps are for?' is the wordplay.
I cannot quite understand how this works, but
'house' could be 'ho' (abbreviation for house) and 'ho' is present in the answer.
This explanation may well be incorrect...

'what' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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