Crossword puzzle clue "it precedes the domain name extensions added to this puzzle's theme entries"

It precedes the domain name extensions added to this puzzle's theme entries

Its common extensions are the theme of this puzzle

QB whose name is added phonetically to the middle of the three long entries

Witch, and the combination of letters added to this puzzle's theme answers

Powerful political gp., or, read another way, an illustration of what's added in front of this puzzle's theme answers

Supplements added to each of this puzzle's theme answers

What each of this puzzle's theme entries contains

What are featured in the theme entries of this puzzle