The term 'FEVERISH FIT' can be broken down into two words, 'FEVERISH' and 'FIT'. The word 'FEVERISH' is an adjective that describes a person or thing that is affected by a fever, which is a medical condition characterized by an abnormally high body temperature. The word 'FIT' is a noun that refers to a sudden outburst of energy or activity. Together, the term 'FEVERISH FIT' describes a sudden outburst of energy or activity caused by a fever. The crossword solution for this term is 'AGUE', which is an old-fashioned term for a fever or a FIT of shivering.