The term 'SMALL TO-DO' can be broken down into two crossword solutions: SPAT (4 letters) and RUNIN (5 letters). SPAT is an acronym for 'Small Projects and Tasks', which is a term used to describe small tasks that need to be completed. RUNIN stands for 'Run It Now', which is a phrase used to indicate that a task should be done immediately. Together, these two solutions form the phrase 'Small To-Do', which is used to refer to a list of small tasks that need to be completed in a timely manner.