An option to be able to see a limited amount of previously played songs in the queue tab by scrolling upward. I spend a lot of time looking for songs that were just being played that I want to add to a playlist. This idea would not add clutter, because it would be hidden until the user scrolls up from the currently playing song.
It looks like your idea was posted a while ago but, unfortunately, it hasn't gathered the minimum amount of votes to stay active in the Ideas Exchange (50 votes in the first 3 months). I'll mark your idea as "Closed - Not Enough Votes". You can learn more on how the Ideas Exchange works here.