Reveal: There are 5 words that if they lose their cool (AC, as in air conditioning) become different words- 20A minus AC becomes FADES, 30A = CORD, 40A = GRIME, 49A = CHET, 59A = PRIVY. The new words have synonyms/related words elsewhere in the grid. FADES = 63A, CORD = 19A, GRIME = 53A, CHET = 47A, PRIVY = 5A. The first letters of these words, in grid order, spell IRATE.