Pop in during the break for a meal (6)

I believe the answer is:

repast

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'meal' is the definition.
(repast can mean a meal)

'pop in during the break' is the wordplay.
'pop in' becomes 'pa' (I can't explain this - if you can you should believe this answer much more).
'during' indicates putting letters inside.
'the break' becomes 'rest' (a rest is taking a break).
'pa' going inside 'rest' is 'REPAST'.

'for a' acts as a link.

Can you help me to learn more?

(Other definitions for repast that I've seen before include "Food - tapers (anag)" , "A meal concerning time gone by" , "Prates about meal" , "Feast, meal" , "lunch?" .)

I've seen this clue in the Evening Standard.

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