Try out the bed - it’s made up (3)

I believe the answer is:

lie

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'it's made up' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

(Other definitions for lie that I've seen before include "Fib - be prone" , "Fib in alienation" , "Prevaricate or recline" , "Assume recumbent posture" , "buried" .)

I've seen this clue in the Evening Standard.

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