The term 'minimal amounts' refers to the smallest possible quantity of something. The crossword solutions LEASTS (6 letters), TADS (4 letters), IOTAS (5 letters) and TRACES (6 letters) all refer to very small amounts of something. LEASTS is the plural form of the word 'LEAST, ' which means the smallest amount or number possible. TADS is a slang term for a small amount, usually referring to money. IOTAS is a Greek word meaning 'very small amount.' Finally, TRACES is a word that means a very small amount, often used to describe something that is barely visible.