Grow choppers (6)
I believe the answer is:
teethe
'grow choppers' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for teethe that I've seen before include "Have initial trouble (as a baby?)" , "Cut one's primary dentition" , "Cut one's first choppers" , "Of baby, grow molars, canines etc" , "Cut one's milk teeth" .)