Risky, facing imminent tooth trouble? (10)
I believe the answer is:
precarious
'risky' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for precarious that I've seen before include "Hairy" , "Highly insecure" , "Uncertain; likely to fall" , "having difficulty remaining upright" , "Not having a steady position" .)