I have this LESS setup:

.wrapper {
    .parent {
       height: 100px;

       .children {
          //some style;

          &:hover {

              .parent & {
                 height: 150px;
              }
          }
       }
    }
}

I need to change some height for parent element by hover on some child inside of it. This code is not working, so is there any possible to do this? Much thx for help.

Adding the :hover to the .parent instead of the .children div will achieve the result, http://codepen.io/duncanbeattie/pen/xvDdu

.wrapper {
    .parent {
        pointer-events:none;
        height: 100px;
        background:#000;
        .children {
            //some style;
            height:20px;
            background:#f00;
            pointer-events:all;
        }
        &:hover {
            height:150px;
        }
    }
}