Ground nutmeg is the seed of the nutmeg tree, which is native to Indonesia. It is a spice commonly used in cooking and baking. The term 'ground nutmeg' can also refer to the powder form of the spice, which is made by grinding the seed. The crossword solution for the term 'ground nutmeg' is 'MACE, ' which is the dried, lacy outer covering of the nutmeg seed. MACE has a similar flavor to nutmeg, but is more intense and slightly sweeter.