Visits doctor before work with something bad (5,2)
I believe the answer is:
drops in
'visits' is the definition.
(dropping in is a kind of visiting)
'doctor before work with something bad' is the wordplay.
'doctor' becomes 'Dr' (synonyms).
'before' is a charade indicator (letters next to each other).
'work' becomes 'op' (abbreviation for opus).
'with' says to put letters next to each other.
'something bad' becomes 'sin' (something morally bad).
'dr'+'op'+'sin'='DROPS IN'
(Other definitions for drops in that I've seen before include "Casually visits" , "eye thus getting less inflamed?" , "Comes to see" , "Calls casually" .)