Crossword Genius

Doesn't shoot the extras (6)

Ross

I believe the answer is:

spares

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

'extras' is the definition.
(both can mean leftovers)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for spares that I've seen before include "Replacement items, like tyres" , "Lets off; reserve parts" , "Extras in case of necessity" , "Is merciful towards, refrains from hurting" , "Extras with spears" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app