Just a piano? (7)

I believe the answer is:

upright

I believe this clue is a double definition.

'just' is the first definition.
(both can mean fair or honest)

'a piano' is the second definition.
(I know that upright is a type of piano)

(Other definitions for upright that I've seen before include "Pig hurt (anag) -- noble" , "Pole; principled" , "Key item" , "Joanna" , "Type of piano" .)

I've seen this clue in The Globe and Mail and The Telegraph.

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