Remove Menu Bullets created in widget area

(I’ll quickly re-cap as the support was so fast that the ticket was closed before I could check stuff).
I’ve created a widget menu, then used “content elements” – “widget area” to add this widget (with menu in it) to a page, sadly I can’t figure out how to remove the bullet points that are generated.

I’ve tried this in the quick css area.

#top .widget_nav_menu li:before {
content: none;
}

Upon the last ticket I tried adding:
#top .widget_nav_menu ul ul li:before { display: none; }
As suggested by yigit

That didn’t make any difference, so I added:

ul.disc, .entry-content-wrapper ul {
    list-style: none outside none;
}

Which did work as mentioned – but of course this removes the ul from all standard bullets on every page.

You’re help much appreciated – ps impressed with the speedy response!