A piece of chocolate roll? Not now thanks (5)

I believe the answer is:

later

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'a piece of chocolate roll? not now thanks' is the definition.
I can't tell whether this defines the answer.

'a piece of chocolate roll? not' is the wordplay.
'a piece of' says the answer is hidden in the clue.
'LATER' can be found hidden inside 'chocolate roll not'.

Can you help me to learn more?

(Other definitions for later that I've seen before include "Eventually" , "goodbye" , "Subsequently" , "at a subsequent point" , "succeeding" .)

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

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