What a visitor does, making one give up crime (5,2)
I believe the answer is:
drops in
'what a visitor does' is the definition.
The definition suggests a comparative adjective but the answer is not.
'give up crime' is the wordplay.
'give up' becomes 'drop' (dropping is a kind of giving up).
'crime' becomes 'sin'.
'drop'+'sin'='DROPS IN'
'making one' is the link.
Can you help me to learn more?
(Other definitions for drops in that I've seen before include "Casually visits" , "Calls casually" , "Comes to see" , "eye thus getting less inflamed?" .)