Just a suggestion… There are a couple of ways I would consider adjusting the mix for this. One way would be to turn the level down and pan the track harder to the left or right. This lets you reduce the volume but keep the presence of the instrument alive in the mix. Another way would be to apply a bit of frequency rolloff on that track, just soften the high frequency a bit. Also, combine that with lower level and panning. Etc.
Since there is nothing else in the mix competing with that sound, lower level and, maybe, panning should do the trick. I might even duplicate the track and pan one of them hard(er) left, and one hard(er) right, and take the levels down on both. You’d get a wide stereo effect in both left and right sides but could do it at a much reduced volume level.
Hope this gives you some ideas to play with! Again, great stuff!! Keep it up!!