Note lover is forced to flatter (6)
I believe the answer is:
grovel
'to flatter' is the definition.
(thesaurus)
'note lover is forced' is the wordplay.
'note' becomes 'g' (musical note).
'is forced' indicates anagramming the letters.
'lover' with letters rearranged gives 'rovel'.
'g'+'rovel'='GROVEL'
(Other definitions for grovel that I've seen before include "Cringe in abject manner" , "Prostrate oneself" , "Behave obsequiously, humble oneself" , "Behave obsequiously in fear or servitude" , "Behave obsequiously, crawl" .)