Crossword Genius

Promise onboard weapons (6)

Ross

I believe the answer is:

swords

'weapons' is the definition.
(sword is a kind of weapon)

'promise onboard' is the wordplay.
I cannot quite understand how this works, but
'promise' could be 'word' (as in 'I give you my word') and 'word' is located in the answer.
This explanation may well be incorrect...

(Other definitions for swords that I've seen before include "Steel weapons" , "Weapons from north Co Dublin?" , "Eg, rapiers, sabres" , "Fighting blades" , "Weapons; a Tarot suit" .)

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.