Yes, there's actually several ways, but do you want it to clear the dropdown for any radio button, or just a specific value?

In general, the code you need is as follows

$(document).ready(function(){

  // attach click event handler to your radio button
  $('#q24 input').on('click',function(){

    // clear the value of your drop down
    $('#q133 select').val('').change();
  });

});

The .change() after you set the value is important because it will ensure Forms runs all the necessary processes as if a user changed the value.

If you only want this to happen for one of the radio button options, then add :eq(#) after input and enter the index (the option number minus 1).

For example, to add it only to the 2nd radio option you'd use the following:

$('#q24 input:eq(1)')

If you want it to clear if you just click anywhere near the radio fields, then you can remove the "input" part entirely, but then it would trigger even if you clicked the label or the empty space to the right of the form.

Again, you can do this many different ways, but this is a relatively simple example.