keep one’s hand in something

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Leonard was a very close observer, and collector, of this scene ; always keeping his hand in with his guitar, writing much of his early poetry to the sound of its music.

I chose that because I thought I would still be able to keep my hand in by writing the staff newspaper.

Having been trained in Institutional Management I still like to keep my hand in by catering for private functions such as weddings and christenings.

(BNC-B)

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