Record a playing error by a novice (3)
I believe the answer is:
log
'record' is the definition.
(log is a kind of record)
'a playing error by a novice' is the wordplay.
'a playing error' becomes 'og' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'by' is a charade indicator (letters next to each other).
'a novice' becomes 'L' (as in a learner driver with L-plates on their car).
'og' put after 'l' is 'LOG'.
Can you help me to learn more?
(Other definitions for log that I've seen before include "Sea captain's diary of voyage" , "Record; cut wood" , "Enter" , "Official record of events" , "Piece of cut wood" .)