Tend; medical worker (5)
I believe the answer is:
nurse
I believe this clue is a double definition.
'tend' is the first definition.
(as in tending or nursing a patient)
'medical worker' is the second definition.
(I've seen this before)
(Other definitions for nurse that I've seen before include "drink slowly" , "Tend the sick" , "Carer for the sick; shark" , "Professional carer" , "Minister to" .)