Creature given double support (5)

I believe the answer is:

biped

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'creature' is the definition.
(I know that biped is a type of creature)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for biped that I've seen before include "Primate, for example" , "Two-legged creature" , "One standing on two feet" , "Walker on two feet" , "Two legged creature" .)

I've seen this clue in The Globe and Mail.

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