Calls to urge reform on an evildoer? (5,2)
I believe the answer is:
drops in
'calls' is the definition.
(call can mean to visit or drop in)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for drops in that I've seen before include "Comes to see" , "Casually visits" , "eye thus getting less inflamed?" , "Calls casually" .)