Ever changing wind movement (4)
I believe the answer is:
veer
'wind movement' is the definition.
'veer' can be an answer for 'wind' (thesaurus). I am not sure about the 'movement' bit.
'ever changing' is the wordplay.
'changing' indicates anagramming the letters.
'ever' anagrammed gives 'VEER'.
Can you help me to learn more?
(Other definitions for veer that I've seen before include "Sudden direction change" , "Suddenly change direction" , "Swerve" , "Change direction abruptly" , "Deviate" .)