Crossword Genius

Frequent flyer's black dog?

Ross

I believe the answer is:

jetsetter

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

'black dog?' is the definition.
(I've seen this in another clue)

'frequent flyer's' is the wordplay.
I cannot quite understand how this works, but
'flyer's' could be 'jets' (jet is a kind of aircraft) and 'jets' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Daily Mail.
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