Just use a vibrator or fake it, bro. Sorry, I am a salty, old-ass camgirl. You are providing entertainment. You should absolutely enjoy yourself. Invest in a Hitachi! I was a hardcore model for the first two years of my career, and no one complained when I used the Hitachi in conjunction with a toy, or my fingers, or with butt stuff, or even by itself. Most of the time, your members just want to see you pleased.
I don't necessarily condone faking it, but if you are in a scenario where they are totally against clit stimulation like some penile focused neo-Cretins, put your acting abilities to use. Be as authentic as you can, when you can, but don't punish your body in the name of customer satisfaction.
The majority of women can't come without clitoral stimulation. This is very normal. Just have fun with it, get some sweet sex toys, and use your judgment. I've been doing this for five years. I've transitioned to exclusively femdom, but my ability (or inability, aside from with trusted partners) to orgasm strictly vaginally has never hindered my career and I do quite well for myself.