The term 'used needle and thread' refers to a process of stitching fabric together using a needle and thread. This process is commonly referred to as sewing, and can be done by hand or with a machine. Sewing is often used to repair or alter clothing, or to create new items from fabric. The crossword solutions for this term are 'sewn' (4 letters), 'sewed' (5 letters), and 'darned' (6 letters). Sewn and sewed refer to the same process of stitching fabric together, while darned is a specific type of sewing used to repair holes in fabric.