Dentists may resort to this procedure (5)
I believe the answer is:
drill
'this procedure' is the definition.
(I have seen 'correct procedure' mean 'drill' so perhaps 'procedure' could also mean 'drill')
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for drill that I've seen before include "Square-bashing" , "Twilled cotton; soldiers' exercise" , "Seed machine; baboon" , "Procedure - practice" , "Twill-weave cotton cloth" .)