Crossword Genius

Jolly nasty female replacing king with prince (5)

Ross

I believe the answer is:

happy

'jolly' is the definition.
(thesaurus)

I don't understand the rest of the clue.

(Other definitions for happy that I've seen before include "Doc's smiling pal" , "A not so low" , "One of the Seven Dwarves" , "Gleeful" , "Well-pleased" .)

I've seen this clue in The Guardian.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.