Perform Beethoven's fifth, or just one note (3)
I believe the answer is:
doh
'just one note' is the definition.
'doh' can be an answer for 'note' (alternative spelling of 'do' as in do re mi). I am not sure about the 'just one' bit.
'perform beethoven's fifth' is the wordplay.
'perform' becomes 'do' (synonyms).
'beethoven's fifth' becomes 'h' (5th letter of 'beethoven').
'do'+'h'='DOH'
'or' is the link.
Can you help me to learn more?
(Other definitions for doh that I've seen before include "Note; exclamation" , "First note of tonic sol-fa scale" , "for 7 [HOMER] of course!" , "annoyed expression" , "whoops!" .)