expression, noun
visitor from afar; foreign visitor
A somewhat literary or formal expression for a guest who has traveled a long distance, often from another country.
遠来の客を温かくもてなす。
We warmly welcome a visitor from afar.
遠方からの客 is a more colloquial way to say 'guest from far away', while 遠来の客 is a set phrase with a slightly literary feel.
A compound of 遠来 (far-coming) and 客 (guest). The exact historical derivation is uncertain, but it is a conventional set phrase.