The term 'trace amount' can be broken down into four crossword solutions: DRIB (4 letters), TINGE (5 letters), HINT (4 letters), and IOTA (4 letters). DRIB refers to a small amount of liquid that falls in drops, while TINGE is a slight trace of color or flavor. HINT is a subtle indication or suggestion, and IOTA is an infinitesimal amount. Together, these words describe a very small amount of something, which is the definition of trace amount.