Little Jack Horner's prize

I believe the answer is:

plum

(Other definitions for plum that I've seen before include "Dark reddish-purple colour: especially valued" , "Reddish-purple fruit" , "Dark purple" , "Edible oval fruit" , "Much valued -- fruit" .)

I've seen this clue in The Mirror.

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.