This phrase probably refers to a crossword clue the place the reply is a phrase or phrase signifying a week-long journey by air. A typical instance is likely to be a clue like “Journey by airplane for every week” with the reply being “SEVEN-DAY FLIGHT” or an identical development. The clue’s problem would depend upon the encompassing clues and the general complexity of the puzzle.
Such clues mix common data with wordplay, partaking solvers to assume each actually and laterally. The usage of a particular time-frame, like seven days, provides a layer of complexity, requiring solvers to contemplate phrases or phrases associated to period throughout the context of air journey. One of these clue could be significantly difficult in cryptic crosswords the place the clue could comprise puns, anagrams, or different wordplay parts. In the end, efficiently fixing such clues contributes to the satisfying psychological train that crosswords present.