When foreign words containing a letter not used in English, such as á,é, ç or ñ, appear in a crossword, the diacritical marks are almost always omitted, although I do recall one puzzle which included several Spanish words containing the letter Ñ. The puzzle's solution, published in the next day's newspaper, included the Ñ's. Of course the majority of solvers probably spelled the words with an N instead of an Ñ. The mark above the N is a tilde. The tilde also appears over vowels in a few Portuguese words, most notably in the name of Brazil's most populous city, São Paulo.
In today's crossword, the French word ELEVE is properly spelled élève. It means "pupil" or "student" and comes from the verb élever, which means "raise" or "bring up."