Crossword Genius

Children out of university: son after 1000 smackers? (6)

Ross

I believe the answer is:

kisses

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

'smackers?' is the definition.
(smacker is a kind of kiss)

'children out of university son after 1000' is the wordplay.
I cannot really see how this works, but
'son' could be 'ss' (I've seen this in other clues) and 'ss' is located in the answer.
'1000' could be 'k' (synonyms) and 'k' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for kisses that I've seen before include "Lightly touches" , "Smackers" , "Pecks" , "Osculations" , "Light touches" .)

I've seen this clue in The Guardian.
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