The term 'Shake, as a tail' can be solved by the crossword solutions ELUDE (5 letters), LOSE (4 letters) and WAG (3 letters). ELUDE means to avoid or escape from something, usually by using cunning or skill. LOSE means to be deprived of or cease to have or retain something. WAG means to move back and forth or from side to side, often in an excited or playful manner. All three words can be used to describe the action of shaking a tail, which is a common behavior among animals such as cats and dogs.