fraught > filled despite > anger; malice
2 And chawing vengeance all the way I went),
chawing > chewing, champing; fig.: ruminating upon, brooding over
3 Soon as my loathed love appeared in sight,
Soon > [As soon]
4 With wrathful hand I slew her innocent; 5 That after soon I dearly did lament:
That > [That deed] dearly > sorely, grievously
6 For when the cause of that outrageous deed
cause of > [motive for]
7 Demanded (I made plain and evident),