Well, that's the all story about the scientific side of things of mastering ( or at least making your tracks ready for distribution ). It all depends of the medium you're aiming at, for most online distribution -14 LUFS is good but not all platforms treat audio uploads equally. For an internal high quality audio file such as .wav or .aiff format, you can aim at -9, even -8 LUFS. Now LUFS refers to an average metering of the integrated loudness across the all track, there's other measurements like PLR & PSR which are also interesting to look at and giving your instant loudness measures.
So the point when making your track ready for distribution is to reach instant peaks levels at around -2 or -3 dBFS maximum while retaining the LUFS target you're aiming for. Basically you technically do this with compression, limiting, working on the stereo & mono image of the track.
I did make a mistake when listening to your track the first time, sorry about that, I just realized that I had the "safe headroom" feature engaged in Sonarworks Reference 4, therefore having the signal being reduced by a -8.2 dBFS value. So in fact your track is just peaking over +0.1 dBFS, so in fact you could just reduce your master level for -0.5 or -1 dB before uploading it and it won't be clipping, but again this is a very minor adjustment.
If you'd like to dive more into this ( probably not the fumiest thing in audio production ) here are some resources :