### Clue: Learn by accident maybe contents of cover he arranged (8)
### Answer: OVERHEAR 
 ### Explanation: Definition: Learn by accident maybe
  ~~**Anagram of**(arranged) [OVE(inner letters,contents of "cover") + HE] ~~ Edit.note:  Thanks to  the correct parsing is: ***Hidden in***(contents of) cOVER HE ARranged.  I got fixed on "arranged" as an (obvious) anagrind.