Crossword Genius

Free satellite dish here? (2,3,5)

Ross

I believe the answer is:

on the house

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

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for on the house that I've seen before include "for no money" , "At the publican's expense" , "Free" , "No charge" , "Where satellite dish may be" .)

I've seen this clue in The Guardian.
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