Not well and unable to offer entertainments, barring piano (3,2,5)
I believe the answer is:
out of sorts
'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" .)