Government, a la Mussolini - FASCISM
"Central" mountain - MASSIF
Kind of berry found in gin - JUNIPER
Do harm - INJURE
It rides a carousel, sometimes - LUGGAGE
Goose gathering - GAGGLE
Variety of gasoline - PREMIUM
In need of refinement - IMPURE
Rule over a court of law - PRESIDE
The brown recluse, e.g. - SPIDER
Make statements in a court of law - TESTIFY
Spry and energetic - FEISTY
Leftover letters: O C P U M E T
Passcode: COMPUTE