The crossword solution for the term 'stretchy starter' is 'elasto, ' which is a six-letter word. Elasto is an adjective that describes something that is able to stretch or expand without breaking. It is often used to describe materials such as rubber, plastic, and fabric. Elasto is derived from the Greek word 'elastikos, ' which means 'FLEXIBLE.' This term is commonly used in the fields of engineering and material science.