I'm hearing it. It's a synth lead of some sort. A sine wave with some light distortion, maybe a saw wave layered with it lightly, some tremolo or vibrato, a decent amount of portamento (slide/glide, whatever you prefer to call it) to suit the song and a hint of reverb to make it a lil more lush. The saw wav/distortion and reverb are optional, as I don't really hear it pronounced in the song, but it will make for a more interesting sound. The portamento is what makes it sound a few milliseconds off.