Pay close attention to is an important phrase that can be used in many different contexts. It is often used to emphasize the importance of paying attention to something or someone. The crossword solutions for this phrase are HEED, NOTE, and BOREINON. HEED means to pay attention to or take notice of something, while NOTE means to observe or take NOTE of something. BOREINON is a combination of two words, 'BORE' and 'inon, ' which together mean to pay close attention to something.