A hatched plan is a plan that has been thought out in detail and is ready to be put into action. It is usually a plan that has been carefully considered and discussed, often with the help of others. The term 'hatched plan' comes from the phrase 'hatching a plan, ' which means to come up with a plan or idea. The crossword solution for the term 'hatched plan' is 'PLOT, ' which refers to the plan itself.