The crossword solutions for the term 'IT'S HOT!' are 'PHEW' and 'BESTSELLER'. 'Phew' is an interjection used to express relief, surprise, or a feeling of being overwhelmed. It is usually uttered when one is relieved that something unpleasant has not happened. 'BESTSELLER' is a term used to describe a book that has sold more copies than other books in its genre. It is usually determined by sales figures from bookstores and online retailers.