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 really understand how this works, but
'piano' could be 'p' (musical abbreviation) and 'p' is present in the answer.
an anagram of 'some' is 'mose' which is located in the remaining letters.
'i' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'on' acts as a 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" .)