Doctor sees work decrease (4)
I believe the answer is:
drop
'decrease' is the definition.
(I know that drop is a type of decrease)
'doctor sees work' is the wordplay.
I cannot quite see how this works, but
'doctor' could be 'dr' (abbreviation) and 'dr' is located in the answer.
'work' could be 'op' (short for opus) and 'op' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for drop that I've seen before include "Discontinue; sink" , "Small liquid blob" , "Small amount of liquid" , "down, say, casually" , "Spot" .)