Frozen drip (6)
I believe the answer is:
icicle
'frozen drip' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for icicle that I've seen before include "Frozen water-drips" , "Pendent spear of frozen water" , "Tapering frozen water" , "Winter spike" , "Frozen finger of liquid" .)