Really popular fix capping right process (2,5,2,4)

I believe the answer is:

in point of fact

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'really' is the definition.
Both the answer and definition are adverbs. Maybe you can see an association between them that I don't see?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for in point of fact that I've seen before include "In truth" , "In reality" , "Actually" .)

I've seen this clue in The Sunday Times and The Times.

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