The term 'SPICE UP' can be solved by the crossword solutions LIVEN (5 letters), JAZZ (4 letters), ENHANCE (7 letters), ENLIVEN (7 letters), SEASON (6 letters), and YEASON (6 letters). LIVEN means to make something more lively or exciting, JAZZ is a type of music that originated in the United States in the late 19th century, ENHANCE means to make something better or more attractive, ENLIVEN means to make something more lively or interesting, SEASON means to add salt, pepper, or other spices to food, and yeason is an archaic spelling of SEASON. All of these words refer to making something more interesting or exciting, which is the definition of the phrase 'spice up'.