Killer piano in Prince cover potentially, if you were to do this (6,7)

'killer' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

'piano in prince cover potentially if you were to do this' is the wordplay.
I cannot really see how this works, but
'piano' could be 'p' and 'p' is found within the answer.
an anagram of 'prince' is 'cripen' which is within the remaining letters.
'to' is within the answer.
'do' is present in the answer.
This may be the basis of clue (or it may be nonsense).