Droll prohibitionist (3)
I believe the answer is:
dry
This clue might be a double definition.
'droll' is the first definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?
'prohibitionist' is the second definition.
(synonyms)
Can you help me to learn more?
(Other definitions for dry that I've seen before include "far from sweet" , "Not permitting alcohol" , "(Actor) forget lines" , "Sec" , "Dehydrated" .)