Sharon Stone feels she is being robbed of an acting career due to ageism in the movie business. The ‘Basic Instinct’ actress – who turned 66 in March – added the roles she has been offered have got limited to clichéd bit-parts as she gets older. She told The Times: “People would like to say, ‘You’re too old or you can’t do this or you can’t do that.’ “It’s a little bit hard to cast me as the grandmother. It’d be easier to cast me as the lawyer or the judge or the cop – so they’re not really sure what to do with somebody like me. “I still don’t have my acting career back. I would really like to…