Tasteless chatter in aircraft (5)
I believe the answer is:
plane
'aircraft' is the definition.
(plane is a kind of aircraft)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for plane that I've seen before include "Woodworker's tool" , "Smooth" , "Aircraft - level surface - carpenter's tool" , "Tool for smoothing wood" , "Woodworking tool" .)