Breathing apparatus for flying service? (7)
I believe the answer is:
airline
'breathing apparatus' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'flying service?' is the wordplay.
'flying' becomes 'air' (similar in meaning).
'service?' becomes 'line' (service is a kind of line).
'air'+'line'='AIRLINE'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for airline that I've seen before include "Company operating flying machines" , "It creates inflation" , "Qantas, for example" , "EasyJet, for example" , "SAS, say" .)