### Clue: About band from the '90s making comeback one only works for money (4)
### Answer: MERC 
 ### Explanation: Definition: one only works for money
 **Reversal of**(… making comeback) [C(abbrev. for "circa"/"about" in reference to a specific date or period in time) + R.E.M.(American rock band from the '90s)].
Defn: Short for …