The term 'Puts to a Test' can be summarized by the crossword solution 'Assays'. An assay is a type of test or analysis used to determine the presence, quantity, or quality of a particular substance. It is commonly used in the fields of medicine and science to measure the concentration of a drug or other substance in a sample. Assays are also used to evaluate the purity of a substance or to detect the presence of contaminants.