Crossword Genius

Transport provider's melody with lyric (7)

Ross

I believe the answer is:

airline

I'm a little stuck... Click here to teach me more about this clue!

'transport' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for airline that I've seen before include "Company operating aeroplanes" , "Virgin, possibly" , "Transport organisation" , "Transport business" , "It creates inflation" .)

I've seen this clue in The Sun.
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