The term 'Small Flier' can be broken down into three crossword solutions: GNAT (4 letters), WREN (4 letters), and MODELAIRPLANE (13 letters). A GNAT is a small, two-winged insect that often swarms around people in the summer. A WREN is a small, brown bird with a long tail. A model airplane is a miniature replica of a real aircraft, usually made of plastic or wood. All three of these solutions are examples of small fliers.