Cannot delete phrase from track

I'm trying to remove the phrase from a track. I've tried the Clear button which says it will remove all phrase but leaves the Intro in place. After reading the guide I see this is actually expected behaviour. This means the warning message saying all Phrases will be deleted in misleading and should be updated to say the intro will be left.

I also tried to analayze the track again with the Phrase checkbox unticked but that also leaves any existing Phrases on the track. 

So how do I remove a Phrase completely?