The crossword solution for the term GROWS WEAK is FLAG, which is a four-letter word. A FLAG is a piece of fabric with a design or symbol that is used as a symbol of a nation, organization, or group. Flags are often flown from a pole or mast and are used to represent a country or cause. Flags can also be used to show support for a particular cause or to signal a warning. The phrase 'GROWS WEAK' can refer to a FLAG that is no longer seen as a symbol of strength or power, but rather as a sign of weakness or decline.