Popular as arctic winds after March (10)
I believe the answer is:
democratic
'popular' is the definition.
(I know that popular can be written as democratic)
'arctic winds after march' is the wordplay.
'winds' indicates anagramming the letters (the letters wind around).
'after' says to put letters next to each other.
'march' becomes 'demo' (as in a demonstration).
'arctic' anagrammed gives 'cratic'.
'cratic' after 'demo' is 'DEMOCRATIC'.
'as' is the link.
(Other definitions for democratic that I've seen before include "party in US" , "Popular" , "Enabling the will of the people" , "Egalitarian" , "23 [JFK] was" .)