Drop drastically (6)
I believe the answer is:
plunge
(Other definitions for plunge that I've seen before include "A steep drop" , "take a dip in the pool" , "Sudden drop" , "Drop steeply" , "'Dive, plummet (6)'" .)
I believe the answer is:
plunge
(Other definitions for plunge that I've seen before include "A steep drop" , "take a dip in the pool" , "Sudden drop" , "Drop steeply" , "'Dive, plummet (6)'" .)