Breathing apparatus used by transport company? (7)
I believe the answer is:
airline
This clue might be a double definition.
'breathing apparatus' is the first definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'transport company?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'used by' acts as a link.
Can you help me to learn more?
(Other definitions for airline that I've seen before include "BA, say" , "Qantas, for example" , "EasyJet, for example" , "carrier" , "Company providing scheduled flights" .)