Crossword Genius

What Pompeii tour offers is yet to be confirmed (7,2,2,4)

Ross

I believe the answer is:

remains to be seen

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

'what pompeii tour' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'is yet to be confirmed' is the wordplay.
I cannot really see how this works, but
'is' could be 'be' and 'be' is located in the answer.
'to' is found in the answer.
'be' could be 'remain' (remaining is a kind of being) and 'remain' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

'offers' is the link.

Can you help me to learn more?

I've seen this clue in The Times.
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