Work on guilt after doctor visits (5,2)
I believe the answer is:
drops in
'visits' is the definition.
(dropping in is a kind of visiting)
'work on guilt after doctor' is the wordplay.
'work on' becomes 'op' (common abbreviation for 'opus'. I am not sure about the 'on' bit.).
'guilt' becomes 'sin' (guilty behaviour).
'after' is a charade indicator (letters next to each other).
'doctor' becomes 'Dr' (abbreviation).
'op'+'sin'='opsin'
'opsin' put after 'dr' is 'DROPS IN'.
(Other definitions for drops in that I've seen before include "Comes to see" , "Casually visits" , "eye thus getting less inflamed?" , "Calls casually" .)