The crossword solution for the term 'Aqueduct Action' is BET, which stands for Bridge, Embankment and Tunnel. This term is used to describe the three main methods of constructing an aqueduct, which is a man-made waterway or channel that is used to transport water from one place to another. The bridge method involves building a bridge over a river or other body of water, while the embankment method involves creating a raised structure to carry the water across land. The tunnel method involves digging a tunnel through a mountain or other obstacle to create a passage for the water.