Doctor sees work fall (4)
I believe the answer is:
drop
'fall' is the definition.
(synonyms)
'doctor sees work' is the wordplay.
I cannot quite understand how this works, but
'doctor' could be 'dr' (abbreviation) and 'dr' is found in the answer.
'work' could be 'op' (operation, work done in an operating theatre) and 'op' is found 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 "small amount of alcohol" , "Sink; sweet; set down" , "Small drink" , "Discontinue -- delivery" , "Fall; abandon" .)