Clean safari instance for test run

hi, im fairly new to appium so sorry if im missing something…

im trying to run a mobile web test on a real device. im using an iphone 5s with ios 8.1 installed.
i am able to open the safari using the safari launcher, but i want it to open a new instance of safari and not the current active one (that has old tabs opened on it)
is it possible to open a clean instance of safari, or, on the other hand, close all open tabs at the end of the run to get a fresh instance the next time?

thanks in advance