Hotel piano? (5)

I believe the answer is:

grand

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This could be a double definition.

'hotel' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'piano?' is the second definition.
(I know that grand is a type of forte-piano)

Can you help me to learn more?

(Other definitions for grand that I've seen before include "Imposing; PS1,000" , "PS1000 (sl.)" , "Majestic" , "GBP1,000" , "PS1k" .)

I've seen this clue in the Evening Standard.

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