Crossword Genius

Horse in box, one going to bolt (8)

Ross

I believe the answer is:

chestnut

'horse' is the definition.
(chestnut is a kind of horse)

'box one going to bolt' is the wordplay.
'box' becomes 'chest' (chest is a kind of box).
'one going to bolt' becomes 'nut'.
'chest'+'nut'='CHESTNUT'

'in' acts as a link.

(Other definitions for chestnut that I've seen before include "funny old thing?" , "Item for stuffing" , "Old joke - edible kernel" , "Old story" , "Golden to reddish brown colour" .)

I've seen this clue in The Times.
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.