The term WEAVER'S BOBBIN is a tool used by weavers in the process of weaving. It is a spindle or cylinder, usually made of wood, that holds the weft yarn in place while the warp threads are woven around it. The crossword solution for this term is PIRN, which is a type of bobbin used in weaving. A pirn is a wooden spool or bobbin that is filled with weft yarn and inserted into the shuttle of a loom.