The term 'higher up' can be defined by three crossword solutions: EXEC (4 letters), TALLER (6 letters), and ELDER (5 letters). EXEC is an abbreviation for executive, which is a person in a position of authority in a company or organization. TALLER is a comparative adjective meaning greater in height than something else. ELDER is an adjective meaning older or more senior in age or rank. Therefore, the term 'higher up' can be used to describe someone who is in a higher position of authority, taller than someone else, or older than someone else.