Put on the piano some I am about to play (6)
I believe the answer is:
impose
'put' is the definition.
(thesaurus)
'the piano some i am about to play' is the wordplay.
I cannot quite understand how this works, but
'piano' could be 'p' (musical abbreviation) and 'p' is found within the answer.
an anagram of 'some' is 'mose' which is present in the remaining letters.
'i' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'on' is the link.
Can you help me to learn more?
(Other definitions for impose that I've seen before include "Force on others" , "Put burden or tax on" , "Put on, tax or obligation" , "Obtrude, force (on)" , "Put or lay on- say a tax" .)