A corset tightener is a person who adjusts and laces corsets. The job requires the use of various tools, such as a lacers (5 letters), situp (5 letters), GUT (3 letters) and stays (5 letters). A lacers is a tool used to lace up the back of a corset, while a situp is a tool used to pull the lacing tight. GUT is a type of cord used to lace the corset, and stays are metal or plastic pieces that are inserted into the corset to provide extra support.