Broken leg, hit with beam, getting split? (5,5)

I believe the answer is:

white light

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'beam getting split?' is the definition.
The definition suggests a singular noun which matches the answer.

'broken leg hit with' is the wordplay.
'broken' indicates anagramming the letters.
'leg'+'hit'+'with'='leghitwith'
'leghitwith' anagrammed gives 'WHITE LIGHT'.

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I've seen this clue in The Independent.

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