Watch the IV Chord Love online guitar lesson by Andy Aledort from 30 Beginner Slide Blues Guitar Licks You MUST Know
A common practice when soloing with a slide is to take a melodic phrase or idea and then transpose it to accommodate each of the chords in the progression. This concept of treating the lick as a "theme" that's repeated in different keys is one that musicians often use to establish a compositional quality in their solos.
This lick is identical to Lick 6, but here it's moved down to A, the four chord. It's executed in exactly the same manner, except we're now centered around the fifth fret instead of the 12th fret as when the lick was played over an E chord.