Boutros Boutros-Ghali's repeated conclusion (5)

I believe the answer is:

outro

'conclusion' is the definition.
(I know that conclusion can be written as outro)

'boutros boutros-ghali's repeated' is the wordplay.
'OUTRO' is hidden in amongst the letters.
However, I am unsure how the hidden word is indicated.

(Other definitions for outro that I've seen before include "last lot of notes" , "bars closing" , "Part that closes" , "Piece ending programme" .)

I've seen this clue in The Guardian.

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