Where some spend the rest of the afternoon (3,4)

I believe the answer is:

day beds

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'the rest of the afternoon' is the definition.
I can't judge whether this definition defines the answer.

'where some spend' is the wordplay.
'where' becomes 'daybed' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'some' indicates taking the first letters.
The first letter of 'spend' is 's'.
'daybed'+'s'='DAY BEDS'

Can you help me to learn more?

I've seen this clue in The Globe and Mail.

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