Astir, afoot (2,3,4)
I believe the answer is:
in the wind
This clue is a double definition.
'astir' is the first definition.
(I've seen this before)
'afoot' is the second definition.
(thesaurus)
(Other definitions for in the wind that I've seen before include "Astir; afoot" , "Likely to happen" , "experiencing more of a chill factor?" .)