Spooner fetched shelter for biscuit (10)

I believe the answer is:

shortbread

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'for biscuit' is the definition.
(shortbread is a kind of biscuit)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for shortbread that I've seen before include "biscuits" , "Brittle buttery cake" , "sweet but easily crumbling" , "Crumbly biscuit rich in butter" , "Biscuit with plenty of butter" .)

I've seen this clue in the Sydney Morning Herald.

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