17A In a lively dance, five have a merry time (5)
_ E _ E _ ( If the five is in reference to 5D I haven't got it either!)
25A Rock where one sailor returns with another (6)
_ A _ A _ T
5D The sound of a rhyme for twenty (5) _ O _ S _
21D & 12A Possibly feeling better if called to attention? (3,2,4) _ L _ / A _ / E _ S _