Minister to (5)
'minister to' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for treat that I've seen before include "Source of gratification" , "Nurse" , "Minister - buy one a drink" , "Medicate" , "Pay for someone's food or drink or look after them medically" .)
'minister to' is the definition.
(minister can mean to nurse or tend to)
This is the entire clue.
(Other definitions for tend that I've seen before include "Care for, nurse" , "Look after, or take certain direction" , "Look after (the sick)" , "Look after (a patient)" , "Look after, take care of" .)