Exclude Debra for being out of order (5)

I believe the answer is:

debar

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'exclude' is the definition.
(I know that exclude can be written as debar)

'debra for being out of order' is the wordplay.
'debra' anagrams to 'DEBAR'.
Though, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for debar that I've seen before include "Black" , "Rule out" , "Ban" , "Exclude from a place" , "Exclude (from doing something)" .)

I've seen this clue in the Evening Standard.

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