A sheltered place to get out and walk (6)

I believe the answer is:

garage

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'walk' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for garage that I've seen before include "rock music" , "lock-up?" , "Building for housing automobiles" , "Carport" , "Petrol pump location" .)

I've seen this clue in the Evening Standard.

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