### Clue: Oil family FT backs in Gulf (5)
### Answer: EWING 
 ### Explanation: Definition: Oil family
  **Reversal of**(backs) WE(what the FT,Financial Times calls itself in the crosswords it provides) + IN + G(abbrev. for gulf, in a geographical sense, as in the G. of Carpentaria, the G. of Hauraki, or the Persian G. depending on whether you're from Australia, New Zealand, or the rest of the world 🙂 ).
Answer:  The family whose fortune came from oil, in the TV soap opera "Dallas".