Data's about assassinated leader (5)

I believe the answer is:

sadat

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'leader' is the definition.
(I have seen 'Former leader' mean 'sadat' so perhaps 'leader' could also mean 'sadat')

'data's about assassinated' is the wordplay.
'data's' anagrams to 'SADAT'.
But, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for sadat that I've seen before include "World leader" , "Former president of Egypt" , "Former leader" , "Former Egyptian president" , "assassinated president" .)

I've seen this clue in the Sydney Morning Herald.

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