Weapon a cavalryman will know how to handle? (4)

I believe the answer is:

colt

I'm a little stuck... Click here to teach me more about this clue!

'weapon' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for colt that I've seen before include "Young Arab maybe" , "Youngster" , "Type of American revolver" , "H [HORSE]" , "Mount" .)

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.