Frozen drops (5)
I believe the answer is:
sleet
'frozen drops' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sleet that I've seen before include "Snowy rain" , "Cold precipitation" , "Rain/ice mix" , "Partly melted falling 16 across or 18 down" , "Wintry precipitation" .)