You won't remember why they came to clip me
When time go by you'll soon forget me
Since the alphabet boys are after him that could erase him from history people won´t remember why they killed him. Erase his records databases, lincenses, inprison him. Think Cristopher Dorners situation while everybody who didn´t read his manifesto just believes he was another crook. Or when CIA killed Che Guevara.
He has a bit similar line on his album Life is Good:
To help improve the meaning of these lyrics, visit “Untitled” by Nas Lyrics and leave a comment on the lyrics box