Trigger a Popup with definition. Presenter 13

Hello I am using Presenter 13 and Powerpoint 2013. I am trying to pop up a callout with the definition of a term. So if the learner WANTS to see the definition, they click on the word and get the popup. In PPTX it works using the shape animation trigger "start effect on click of". Presenter doesn't appear to support this. What I don't want to do is add a second slide to create the animation. So how can I do this ?

Thanks

Denise