Scandinavian weeds grow wild (5)
I believe the answer is:
swede
'scandinavian' is the definition.
(Sweden is in Scandinavia)
'weeds grow wild' is the wordplay.
'grow wild' indicates anagramming the letters (I've seen 'growing wild' mean this).
'weeds' with letters rearranged gives 'SWEDE'.
(Other definitions for swede that I've seen before include "plant" , "in Northern Europe" , "Large root vegetable" , "Man from Malmo" , "A turnip, or a Scandinavian" .)