Edit
If this is only a matter of waiting for the document to load and its readiness before executing your script, then the following will work:
$(function() {
$('.slickSlider').slick({
dots: true,
fade: true
});
$('.slickSlider').show();
});
CSS is as follows:
.slickSlider {
display: none;
}
, .slickSlider Display: None, , jQuery.