Fruity authoritarian stripped on Guernsey etc (6)
I believe the answer is:
citric
'fruity' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for citric that I've seen before include "Lemony" , "Fruity" , "Sort of acid" , "like a lemon" , "Acid, from lemons say" .)