Recital performance (4)
'recital performance' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for solo that I've seen before include "Card game; for one" , "Game for four" , "Fly aircraft" , "On one's own, unaccompanied" , "Performed by a single voice or instrument" .)
(Other definitions for piece that I've seen before include "Unpleasant character" , "Bishop, for one" , "man on board" , "Bit; item" , "Slice" .)