A ray of sunshine is a metaphor for something that brings joy and happiness. It is often used to describe a person who is cheerful and optimistic. The term 'ray of sunshine' can also be used to describe a situation that brings joy and happiness. In the crossword, the solution for the term 'ray of sunshine' is BEAM, which is a four-letter word. A BEAM is a ray or shaft of light, which is an appropriate metaphor for a ray of sunshine.