Crossword Genius

Product of commercial airline school, less than half taught, was first to reach exit (9,6)

Ross

I believe the answer is:

scheduled flight

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'product of commercial airline' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'school less than half taught was first to reach exit' is the wordplay.
I cannot quite see how this works, but
'school' could be 'sch' and 'sch' is found in the answer.
'first' could be 'i' (I in Roman numerals eg Elizabeth I) and 'i' is present in the answer.
This explanation may well be incorrect...

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I've seen this clue in The Telegraph.
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