One who doesn't eat quicker (6)

I believe the answer is:

faster

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

'quicker' is the definition.
(I know that quicker can be written as faster)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for faster that I've seen before include "More rapid" , "One refuses to eat" , "at an increased rate?" , "Strafe (anag)" , "One unlikely to eat" .)

I've seen this clue in the Sydney Morning Herald.

Want a hint initially instead of a full solution? Install my app