The term 'on a winning streak' can be represented by two words in a crossword puzzle: HOT (3 letters) and REDHOT (6 letters). HOT is an adjective that means very warm or having a high temperature. It is often used to describe something that is exciting or successful. REDHOT is an intensifier of the word HOT, meaning even more exciting or successful. Therefore, the phrase 'on a winning streak' can be interpreted as something that is very successful or exciting.