Popular electric toothbrush brand

Polynesian island nation... or a top-selling Girl Scout Cookie

With 5-D, maximum throttle (as represented by the grid)

Relating to the prison system

Rudely belligerent... or a notable British anarchopunk band of the 1980s

95, 98, or XP, e.g.

Less refined, as talent

American household appliance brand

Actresses Kirke and Albright and, what the hey, the lady from that Kinks song, too!

See 7-A

Device compatible (if it's ancient enough!) with any of the examples in 1-D's clue, abbr.