Crossword Genius

Where satellite dish might be free (2,3,5)

Ross

I believe the answer is:

on the house

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'be free' is the definition.
(I've seen this in another clue)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for on the house that I've seen before include "for no money" , "Roof tiles so" , "With the management's compliments" , "Where satellite dish may be" , "Where the roofer may be working" .)

I've seen this clue in The Telegraph.
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