iMovie - Ducking audio but still need sound effects

[KMac777]

Hello, I am creating an iMovie project with pictures, transitions, background music, and video clips. I wanted to stop the background audio while my video clip sound is playing and then start up again after the clip is done. So I am using the 'Ducking' option in the audio window. However, I have also added some sounds effects to my video clip that I DO want to play. For example, I have a clip of someone running up to a pitchers mound on a baseball field. While they are running, I have the sound effect of a crowd cheering. However, since I have used the ducking option, the sound effect is also muted along with my background music. How can I still use my sound effect along with the video clip sound but 'duck' out my background music??