To miss couplings is foolish of one who discusses the private lives of celebrities (6,9)

I believe the answer is:

gossip columnist

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'one who discusses the private lives of celebrities' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'to miss couplings is foolish' is the wordplay.
'is foolish' is an anagram indicator (a foolish spelling).
'to'+'miss'+'couplings'='tomisscouplings'
'tomisscouplings' with letters rearranged gives 'GOSSIP COLUMNIST'.

'of' is the link.

Can you help me to learn more?

(Other definitions for gossip columnist that I've seen before include "Newspaper writer" , "journalist" .)

I've seen this clue in The Irish Times.

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