The term 'PARTNER OF ODDS' can be broken down into two crossword solutions: EVENS (5 letters) and ENDS (4 letters). EVENS is a term used to describe a group of numbers that are divisible by two, while ENDS is a term used to describe the last part of something. Together, these two terms form the phrase 'PARTNER OF ODDS', which is used to describe two things that are related but different. In this case, it refers to the relationship between even numbers and odd numbers, which are both part of the same numerical system but have different properties.