Consider what a mirror does (7)

I believe the answer is:

reflect

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'consider' is the definition.
(I know that consider is a kind of reflect)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for reflect that I've seen before include "Ponder; send back" , "Contemplate like mirror" , "Ponder or produce an image" , "Ponder, contemplate" , "chew the cud" .)

I've seen this clue in The Daily Express and The Mirror.

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