Catch up with rest of fiction (popular) (3,2)

I believe the answer is:

lie in

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'catch up with rest' is the definition.
I can't judge whether this definition defines the answer.

'fiction popular' is the wordplay.
'fiction' becomes 'lie' (I've seen this in other clues).
'popular' becomes 'in'.
'lie'+'in'='LIE-IN'

'of' is the link.

Can you help me to learn more?

(Other definitions for lie in that I've seen before include "Extended overnight rest" , "Extra snoozing" , "Extra time abed" , "Delay getting up" , "Get up late" .)

I've seen this clue in The Telegraph.

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