Crossword Genius

Beyond a kiss? (6)

Ross

I believe the answer is:

across

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

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

'a kiss?' is the wordplay.
I cannot really see how this works, but
'a' is within the answer.
The remaining letters 'cross' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for across that I've seen before include "sort of clue?" , "Clues like this" , "From side to side, like this clue" , "As this is entered" , "Astride" .)

I've seen this clue in The Guardian.
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