One new couple in park providing decoration (9)

I believe the answer is:

paintwork

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'decoration' is the definition.
(I've seen this before)

'one new couple in park' is the wordplay.
'one new couple' becomes 'intwo' (I am not sure about this - if you are sure you should believe this answer much more).
'in' means one lot of letters goes inside another.
'intwo' placed inside 'park' is 'PAINTWORK'.

'providing' is the link.

Can you help me to learn more?

(Other definitions for paintwork that I've seen before include "Decoration" , "matt and gloss?" , "Coats maybe" .)

I've seen this clue in The Telegraph.

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