The term 'stealthy sort' is composed of four words: SNEAK (5 letters), CAT (3 letters), FELINE (6 letters), and clarinetburglar (15 letters). The word 'SNEAK' means to move or act in a quiet, cautious, and secret way. The word 'CAT' is a common name for a small domesticated carnivorous mammal. The word 'FELINE' refers to any member of the family Felidae, which includes cats, lions, tigers, and other similar animals. Finally, the word 'clarinetburglar' is a combination of two words: 'CLARINET, ' which is a woodwind instrument, and 'BURGLAR, ' which is someone who commits burglary, or the illegal entry into a building with the intent to commit a crime. Taken together, these words suggest someone who is sneaky, sly, and stealthy, like a CAT, and who is also a thief or BURGLAR, like a clarinetburglar.