Healthy hospital drink (4)
I believe the answer is:
hale
'healthy' is the definition.
(hale can mean fit and healthy)
'hospital drink' is the wordplay.
'hospital' becomes 'h' (abbreviation for hospital on maps).
'drink' becomes 'ale' (type of beer).
'h'+'ale'='HALE'
(Other definitions for hale that I've seen before include "Strong and healthy" , "Healthy and robust" , "Well" , "Showing vigorous good health" , "Healthy and hearty" .)