Intonation (6)
(Other definitions for cadence that I've seen before include "Tonal inflection" , "that may be perfect for musicians" , "Close of a musical phrase" , "Rise and fall" , "Rhythm or beat" .)
'intonation' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for accent that I've seen before include "Distinctive manner of speaking" , "Distinctive manner of oral expression" , "Mark to modify letter" , "Emphasis on syllabus or word" , "Distinctive local way of speaking" .)