### Clue: Rowdy — with 27 in gradual change from 8 to 24 down (4)
### Answer: LOUT 
 ### Explanation: Definition: Rowdy
 Together with the answer to 27 down, found in the series "loud"(answer to 8 down), "lout", "loft"(answer to 27 down), "soft"(answer to 24 down) **with the gradual change of one letter at a time.