The term 'RID OF GRIT' can be solved by the six-letter word 'DESAND'. Desanding is a process used to remove sand and other solid particles from a liquid. It is commonly used in water treatment plants to remove sand and other impurities from water before it is distributed to homes and businesses. Desanding is also used in oil and gas production to remove sand and other solids from produced fluids. In both cases, the process helps to ensure that the liquid is free of grit and other contaminants.