The crossword solution for the term 'Piper's Son of Rhyme' is TOM. Tom is a character from the classic English folktale, 'The Pied Piper of Hamelin'. He is the son of the Pied Piper, who was hired by the town of Hamelin to rid it of rats. The Pied Piper then used his magical pipe to lure the rats away, but when the town refused to pay him, he used the same pipe to lead away all the children of the town. Tom was the only child to remain in the town, as he was deaf and could not hear the Piper's music.