Paul’s friend foolishly admitting one revealing lapse (8,4)

I believe the answer is:

freudian slip

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'lapse' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'paul's friend foolishly admitting one' is the wordplay.
'foolishly' indicates anagramming the letters.
'admitting' is an insertion indicator (admit can mean to welcome in or accept).
'one' becomes 'i' (Roman numeral).
'pauls'+'friend'='paulsfriend'
'paulsfriend' is an anagram of 'freudanslip'.
'freudanslip' going around 'i' is 'FREUDIAN SLIP'.

'revealing' is the link.

Can you help me to learn more?

(Other definitions for freudian slip that I've seen before include "Spoken error revealing unconscious thought" , "can be a revealing thing" , "Unintentional error" , "Mistake revealing hidden concerns" , "Words revealing unconscious thoughts" .)

I've seen this clue in The Times.

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