### Clue: Quiet morning with dirt and clean mop (7)
### Answer: SHAMPOO 
 ### Explanation: Definition: clean mop
 SH!(quiet!;an imperative to be silent) + AM(abbrev. for "ante meridiem", denoting the hours before noontime) **plus**(with) POO(excrement;dirt, as in "dog dirt", euphemisms for "shit").
Defn: To clean;wash a thick mass of untidy har;mop.