Overdue kiss, it’s rubbery (5)

I believe the answer is:

latex

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'it's rubbery' is the definition.
I can't judge whether this defines the answer.

'overdue kiss' is the wordplay.
'overdue' becomes 'late' ('late' can be similar in meaning to 'overdue').
'kiss' becomes 'x'.
'late'+'x'='LATEX'

Can you help me to learn more?

(Other definitions for latex that I've seen before include "Stretchy stuff" , "Synthetic product" , "Milky fluid produced by plants" , "Milky sap of rubber tree" , "Milky substance from rubber tree" .)

I've seen this clue in The Telegraph.

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