The term 'Call at Wimbledon' is a reference to the annual tennis tournament held in London, England. The tournament is one of the four Grand Slam tournaments and is considered one of the most prestigious events in the sport. The crossword solutions for this term are LET (3 letters) and OUT (3 letters). LET is an imperative verb meaning to allow or permit someone to do something, while OUT is a preposition meaning away from the inside or center of something. Together, these two words can be interpreted as a command to leave the court at Wimbledon.