It's on the sheltered side (3)

I believe the answer is:

lee

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'sheltered side' is the definition.
(as in lee side, the side sheltered from wind)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for lee that I've seen before include "Commander of the Confederate States Army in the American Civil War" , "Protection" , "Sheltered accommodation" , "actor" , "Towards the side away from the wind (naut)" .)

I've seen this clue in the Evening Standard.

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