Crossword Genius

Where one might find a satellite dish for free? (2,3,5)

Ross

I believe the answer is:

on the house

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

'free?' is the definition.
(I've seen this before)

'where one might find a satellite dish' is the wordplay.
I cannot really understand how this works, but
'one' could be 'the' (both can introduce a definite example of something) and 'the' is present in the answer.
This explanation may well be incorrect...

'for' acts as a link.

Can you help me to learn more?

(Other definitions for on the house that I've seen before include "Where satellite dish may be" , "Free" , "Roof tiles so" , "Where the roofer may be working" , "Where roof slates should be going" .)

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