Can this be used with acrylic
Not really it is an oil-based product which works with oil paints.
If you want to try using acrylic in the same Bob Ross wet in wet technique, you can try and create your own acrylic version of the Liquid clear by using a medium like slow drying medium or retarder. This slows down the crying time of acrylic giving you more time to blend and move the colour. Mixing the Medium with the acrylic colour as well will ensure at you will not have different drying times.
Alternatively, why not try the Atelier Interactive acrylics. These acrylics can be kept wet for longer periods using a water spray bottle or Unlocking formula, for great blending and reworking techniques.