Clue: Look back on grabbing Simpson's drink (5)
Answer: RIOJA
Explanation: Definition: drink
 **Reversal of**(… back on) AIR(the look/appearance given by someone or something) **containing**(grabbing) OJ(initials of Orenthal James Simpson, former American footballer).
Defn: …, specifically from the vineyards in the Spanish region of the same name:
And OJ also stands for another drink, orange juice.