(n.) One attached to an embassy; one attached to another person or thing\, as a part of a suite or staff.

Admirable Crichton adept ambassador ambassadress apostolic delegate artisan artist authority career diplomat chancellor charge commercial attache connaisseur connoisseur consul consul general consular agent consultant cordon bleu crack shot craftsman dead shot diplomat diplomatic diplomatic agent diplomatist elder statesman emissary envoy envoy extraordinary experienced hand expert expert consultant foreign service officer graduate handy man internuncio journeyman legate marksman military attache minister minister plenipotentiary minister resident no slouch nuncio plenipotentiary politician pro professional professor proficient resident savant secretary of legation shark sharp statesman technical adviser technician vice-consul vice-legate