Special roles arranged for astronomical event (5,7)

I believe the answer is:

solar eclipse

'for astronomical event' is the definition.
(I've seen this in another clue)

'special roles arranged' is the wordplay.
'arranged' indicates an anagram (letters rearranged).
'special'+'roles'='specialroles'
'specialroles' anagrammed gives 'SOLAR ECLIPSE'.

I've seen this clue in The Times.

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