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Out-of-this-world
23
warps
beam
(4,3)
Out-of-this-world 23 warps beam (4,3)
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The definition is at the beginning of the clue.
How the clue works
The definition is Out-of-this-world 23, where 23 refers to another answer (CANDY) — a Mars Bar being a candy with a celestial name. The wordplay is a charade: MARS meaning warps or damages, followed by BAR for beam.