The crossword solution for the term 'A or AN, e.g.' is 'ARTICLE, ' which is a seven-letter word. AN ARTICLE is a type of grammatical element that is used to indicate the definiteness of a noun. Articles are typically either 'a' or 'AN, ' depending on the sound of the following word. For example, 'a' is used before words beginning with a consonant sound, while 'AN' is used before words beginning with a vowel sound.