Doesn't seem like that's available on iOSOk, if OP sees this post, I think he will be very happy. I was looking at the El Capitan features list and one of the features of Safari is Clear history, not cookies. But how could this be? I don't see this functionality anywhere.
So I used the safari help and typed in Help, and right there, I found it! Clear History and Keep Website Data...
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To see the choice, all you need to do is hold the option-key and click on the Safari menu in the menu bar. Now everyone can be happy!