Has snow drifted? (4)
I believe the answer is:
owns
'has' is the definition.
('own' can be a synonym of 'have')
'snow drifted?' is the wordplay.
'drifted?' indicates anagramming the letters (I've seen 'drifting' mean this).
'snow' is an anagram of 'OWNS'.
(Other definitions for owns that I've seen before include "Confesses" , "Has possession of by right" , "Possesses" , "Admits possession" , "uses" .)