The answer to the crossword for the term ORGAN WITH A DRUM is EAR. The EAR is a sensory organ that is responsible for hearing and balance. It is made up of three parts: the outer EAR, the middle EAR, and the inner EAR. The outer EAR consists of the pinna, which is the visible part of the EAR, and the EAR canal. The middle EAR contains the eardrum, which vibrates when sound waves enter the EAR. The inner EAR contains the cochlea, which is filled with fluid and lined with tiny hairs that convert sound vibrations into nerve signals that are sent to the brain.