### Clue: Presidential quarters for the oil family? (5)
### Answer: EWING 
 ### Explanation: Definition: oil family
  E. WING(East Wing, part of the White House, quarters,office and residence, for the US President)
Answer: The fictional family with a fortune in oil in "Dallas", an American TV soap opera with its famous season-end cliff-hanger "Who shot J.R.?"   Horrors!  There's Dallas 2012 coming up!