Windpipe (7)
I believe the answer is:
trachea
'windpipe' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for trachea that I've seen before include "Tube taking inhaled air from the larynx" , "body part" , "air passage" , "get air supply through this" , "Tube carrying air to the lungs" .)