Crossword Genius

Late filing by me may produce one with kisses on (7)

Ross

I believe the answer is:

crossed

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'on' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for crossed that I've seen before include "Passed" , "Intersected; opposed" , "Came over and < annoyed" , "Went over to the other side" , "Traversed" .)

I've seen this clue in The Telegraph.
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