Publish routes used in flights (7)
I believe the answer is:
airways
'in flights' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps there's a link between them I don't understand?
'publish routes' is the wordplay.
'publish' becomes 'air' (I've seen this before).
'routes' becomes 'ways' (I've seen this in another clue).
'air'+'ways'='AIRWAYS'
'used' acts as a link.
Can you help me to learn more?
(Other definitions for airways that I've seen before include "travel company" , "Radio channels" , "Things fly along here" , "Ventilation passages" , "Inspiring passages" .)