The term 'about to go out' can be broken down into three crossword solutions: Guttering (9 letters), DYING (5 letters), and SLEEPY (6 letters). Guttering is a term used to describe the process of rainwater being directed away from a building by means of a channel or pipe. DYING is the process of ceasing to live, and SLEEPY is a feeling of tiredness or drowsiness. Together, these three words can be used to describe someone who is about to go out, as they are feeling tired and close to death.