Exhaled audibly (6)
I believe the answer is:
sighed
'exhaled audibly' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sighed that I've seen before include "Took a deep audible breath" , "Breathed audibly and deeply" , "Sounded dejected" , "Groaned" , "Moaned" .)