Crossword Genius

A box of papers I forgot in rental property – and circular? (7)

Ross

I believe the answer is:

leaflet

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

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

'a box of papers i forgot in rental property' is the wordplay.
I cannot really see how this works, but
'a' is found in the answer.
'rental property' could be 'let' (I've seen this in other clues) and 'let' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

'and' is the link.

Can you help me to learn more?

(Other definitions for leaflet that I've seen before include "Advertising sheet" , "Distribute information" , "little advertising!" , "Flyer, bill" , "Distribute small circulars" .)

I've seen this clue in The Guardian.
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