Crossword Genius

Nervous place where teeth may be set? (2,4)

Ross

I believe the answer is:

on edge

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

'nervous' is the definition.
(on edge can mean nervous or tense)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for on edge that I've seen before include "Nervously excited" , "looking down at Much Wenlock?" , "All agog" , "Cliff-top walker may be" , "Fidgety, nervous" .)

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