The term MARK UP A SCORE is a phrase used in music notation, which involves the process of writing down musical compositions. The two crossword solutions for this term are NOTATE (6 letters) and DEFACETHEMUSIC (14 letters). Notate is a verb meaning to write down a musical composition, while DEFACETHEMUSIC is an anagram of the phrase 'make UP the SCORE'. Therefore, both solutions refer to the same concept of marking UP a SCORE, which is the process of writing down a musical composition.