Draw in air or smoke (6)
I believe the answer is:
inhale
I believe this is a double definition.
'draw in air' is the first definition.
(synonyms)
'smoke' is the second definition.
(inhaling is a kind of smoking)
(Other definitions for inhale that I've seen before include "drag" , "Draw breath" , "Whiff" , "take the air" , "Take smoke into the lungs" .)