DIY for the young? (8)

I believe the answer is:

homework

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'diy' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for homework that I've seen before include "It's done outside school hours" , "Work done outside school" , "Preparation before lesson" , "DIY" , "something to do after school" .)

I've seen this clue in the Evening Standard.

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