Where to keep the manual (5)

I believe the answer is:

handy

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'manual' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?

I don't understand the rest of the clue.

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(Other definitions for handy that I've seen before include "Accessible" , "Dexterous" , "Useful and convenient" , "Near; useful" , "Convenient; skilful" .)

I've seen this clue in the Evening Standard.

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