Float through the air (4)
I believe the answer is:
waft
'float through the air' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for waft that I've seen before include "Cause to float through the air" , "Gently move" , "Gentle movement of air" , "Gently carry" , "Gentle breeze" .)