Fall for a medical man at work (4)
I believe the answer is:
drop
'fall' is the definition.
(synonyms)
'medical man at work' is the wordplay.
'medical man' becomes 'dr' (Dr is an example).
'at' means one lot of letters go next to another.
'work' becomes 'op' (abbreviation for opus).
'dr'+'op'='DROP'
'for a' is the link.
(Other definitions for drop that I've seen before include "Fall; delivery" , "Shoot" , "Fall; abandon" , "Dispense with - sink" , "Fall down after prod" .)