The term 'insignificant thing' can be described by three crossword solutions: TRIFLE (6 letters), minikin (7 letters), and hillofbeans (11 letters). A TRIFLE is a small, unimportant thing, while minikin is an archaic word meaning a tiny person or thing. Hillofbeans is a phrase that means something of little value or importance. All three words are used to describe something that is not important or noteworthy.