### Clue: Internal airline reportedly to keep in touch with receiver (7)
### Answer: TRACHEA 
 ### Explanation: Definition: Internal airline
 **Homophone of**(reportedly) [ "track"(to keep in touch with;to follow another's movements) **plus**(with) "ear"(the sound receiver on you)] .
Defn: Cryptically, the internal tube;line carrying air from larynx to lungs, your windpipe.