Possible Clues:

• Gum-producing plant
• __ gum: thickening agent
• — gum (thickener)
• gum (thickener)
• Kind of gum in food preparation
• ___ gum (thickening agent)
• ___ gum (thickener in toothpastes)
• ___ gum (food thickening agent)
• __ gum: common thickening agent
• Plant that makes gum