In Dr Spooner's view, Arab leader upset temporary arrangement (9)

I believe the answer is:

makeshift

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'temporary arrangement' is the definition.
(thesaurus)

I don't understand how the rest of the clue works.

(Other definitions for makeshift that I've seen before include "Cobbled together" , "this'll do for now" , "Rough and ready" , "Serving as a temporary and less adequate substitute for something" , "serving temporarily?" .)

I've seen this clue in The Independent.

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