From Longman Dictionary of Contemporary Englishclarion callclar‧i‧on call /ˈklæriən ˌkɔːl $ -ˌkɒːl/ noun [countable] formal ASK FOR something/ASK somebody TO DO somethinga strong and direct request for people to do something This election is a clarion call for our country to face the challenges ahead.
Examples from the Corpus
clarion call• Taken together, the studies are a clarion call to doctors to make drug therapy safer.• Ability apart, if such determination should only result in defeat, then what price the victor's clarion call?• But just supposing yesterday's clarion call is the answer to the serious concerns which exist about reading standards in schools.Origin clarion call (1800-1900) clarion type of trumpet (used for battle signals) (1300-1400) Medieval Latin clario, from Latin clarus; → CLEAR1 