The term PRACTICAL CAT is composed of two words: 'PRACTICAL' and 'CAT'. The first word, 'PRACTICAL', means 'having or showing a sensible and PRACTICAL idea of what can be achieved or expected'. The second word, 'CAT', is a common name for the domestic species of the feline family. The crossword solution for this term is MOUSER, which is a six-letter word meaning 'a CAT kept to catch mice'. Therefore, the term PRACTICAL CAT can be defined as a CAT that is kept to catch mice in a PRACTICAL manner.