Crossword Genius

Not well and unable to offer entertainments, barring piano (3,2,5)

Ross

I believe the answer is:

out of sorts

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

'not well' is the definition.
(I've seen this before)

'unable to offer entertainments barring piano' is the wordplay.
I cannot quite understand how this works, but
'to' is within the answer.
This may be the basis of the clue (or it may be nonsense).

'and' acts as a link.

Can you help me to learn more?

(Other definitions for out of sorts that I've seen before include "Slightly unwell" , "Not feeling quite right" , "under the weather" , "Slightly unhappy" , "Lacking variety" .)

I've seen this clue in The Independent.
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