Crossword Genius

Weapon some strap to their feet (8)

Ross

I believe the answer is:

stiletto

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

'weapon' is the definition.
(stiletto is a kind of weapon)

'some strap to their feet' is the wordplay.
I cannot really understand how this works, but
'to' could be 'til' (I've seen this in another clue) and 'til' is found within the answer.
The remaining letters 'setto' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for stiletto that I've seen before include "A short knife, dagger or heel" , "Dagger; tapered heel" , "Small dagger and high narrow heel" , "Thin dagger; heel" , "Type of heel" .)

I've seen this clue in The Guardian.
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