Former British PM ignores leading diplomat, one from a Middle Eastern country (7)

I believe the answer is:

israeli

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But I can't explain it at all! Could you help me understand?

(Other definitions for israeli that I've seen before include "Eg, native of Tel Aviv" , "from Mediterranean country" , "Nationality of citizen of Tel Aviv" , "Jew in a state" , "Country-dweller" .)

I've seen this clue in The Hindu.

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