Inhalation (6)
I believe the answer is:
breath
'inhalation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for breath that I've seen before include "Air that's inhaled and exhaled" , "Air in an out of the lungs" , "Inhale and exhale air" , "Air drawn in and expelled out" , "Slight movement of air" .)