### Clue: Knockout award in return for work on computer? (1-4)
### Answer: E-BOOK 
 ### Explanation: Definition: work on computer
 **Reversal of**(… in return) [ KO(abbrev. for "knock out" used in boxing lingo) + OBE(abbrev. for "Officer of the Most Excellent Order of the British Empire", an award of honour from the British monarch) ].**
Defn: Electronic version of a literary work.