Shoot the pedant to the bottom of the class! (5)
I believe the answer is:
sprig
'shoot' is the definition.
(I've seen this in another clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sprig that I've seen before include "A tack; a little shoot" , "Small branch or shoot" , "Grips with a small branch" , "Younger member of family" , "Youth" .)