Praise cold weather (4)
I believe the answer is:
hail
This clue is a triple definition!
'praise' is the first definition.
(thesaurus)
'cold' is the second definition.
(I've seen this before)
'weather' is the third definition.
(hail is a kind of weather)
(Other definitions for hail that I've seen before include "Call, a taxi say" , "Precipitation - old greeting" , "Ice pellets - greeting" , "Precipitation of ice pellets" , "Old Roman salute, or frozen pellets" .)