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clarion
clarion call
A call to action. The mayor's clarion call to eliminate poverty in the city prompted a number of local organizations to work together to address the problem.
a clarion call
(literary) a strong and clear request for people to do something (often + for ) The charity commission's clarion call for more donations has produced an immediate response. (often + to ) Her unification speech was seen as a clarion call to party members.