Single performances can make a little chap very big (5)
I believe the answer is:
solos
'single performances' is the definition.
(I've seen this in another clue)
'a little chap very big' is the wordplay.
'a little chap' becomes 'sol' (I am not sure about the 'little' bit.).
'very big' becomes 'os' (abbreviation for outsize).
'sol'+'os'='SOLOS'
'can make' acts as a link.
Can you help me to learn more?
(Other definitions for solos that I've seen before include "Numbers" , "Musical passages for one instrument" , "Pieces of music for one voice or instrument" , "Unaccompanied parts" , "Passages for one player" .)