Wintry projection (6)
I believe the answer is:
icicle
'wintry projection' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for icicle that I've seen before include "Winter spike" , "Frozen droplet" , "Hanging ice; stalactite" , "Frozen water drip" , "Spear of ice" .)