The term 'WORKS UP' can be defined by four crossword solutions: INCITES (7 letters), AROUSES (7 letters), RILES (5 letters), and FOMENTS (7 letters). All of these words refer to the act of stirring up or provoking a reaction. INCITES means to urge someone to do something, often through provocation. AROUSES means to stir up or awaken an emotion or feeling. RILES means to irritate or annoy someone. FOMENTS means to encourage or promote the development of something. All of these words are related to the idea of working up a reaction in someone or something.