The term 'Small Mouthful' can be broken down into two crossword solutions: SIP (3 letters) and MORSEL (6 letters). SIP is a verb meaning to take a small amount of liquid into the mouth, usually through a straw or from a cup. A MORSEL is a small piece of food, often used to describe a bite-sized snack. Together, these two words form the phrase 'Small Mouthful, ' which refers to a small amount of food or drink taken into the mouth at one time.