Crossword Genius

Appoint entirely unsatisfactory diplomat (15)

Ross

I believe the answer is:

plenipotentiary

'diplomat' is the definition.
(plenipotentiary is a kind of diplomat)

'appoint entirely unsatisfactory' is the wordplay.
'unsatisfactory' indicates an anagram (I've seen this in other clues).
'appoint'+'entirely'='appointentirely'
'appointentirely' with letters rearranged gives 'PLENIPOTENTIARY'.

(Other definitions for plenipotentiary that I've seen before include "Powerful diplomat" , ""The Ambassador"" .)

I've seen this clue in The Guardian.
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