@selectize/selectize/dist/less/plugins/clear_button.less

Selectize is a jQuery-based custom <select> UI control. Useful for tagging, contact lists, country selectors, etc.

.selectize-control.plugin-clear_button {
  .clear {
      text-decoration: none;
      display: flex;
      position: absolute;
      height: 100%;
      width: 25px;
      top: 0;
      right: calc(@selectize-padding-x - @selectize-padding-item-x);
      color: rgba(0, 0, 0);
      opacity: 0.4;
      font-weight: bold;
      border: none;
      cursor: pointer;
      z-index: 1;
      font-size: 21px;
      justify-content: center;
      align-items: center;
  }

  .clear:hover {
      opacity: 1;
  }

  &.single .clear {
      right: calc(@selectize-padding-x - @selectize-padding-item-x + 1.5rem);
  }

}