[That's right!] (4)
'that's right' is the definition.
(right can mean yes or okay)
This is all the clue.
(Other definitions for yes that I've seen before include "Positive reply" , "Positive response" , "Word of affirmation" , "Confirmation" , "Affirmative answer" .)
'that's right' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for yep that I've seen before include "Affirmative (US colloq.)" , "Positive reaction" , "informal approval" , "Correct" .)
(Other definitions for ding that I've seen before include "Sound" , "- - dong" , "-- -a-ling" , "Keep sounding" .)