Grumpy co-worker? (3)
I believe the answer is:
doc
'grumpy co-worker?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for doc that I've seen before include "bones" , "One of the seven dwarfs" , "Medic, in short" , "GP (colloq.)" , "Disney dwarf" .)