Medical treatment has its point (7)
I believe the answer is:
decimal
'point' is the definition.
(I have seen 'The point' mean 'decimal' so perhaps 'point' could also mean 'decimal')
'medical treatment' is the wordplay.
'treatment' indicates anagramming the letters.
'medical' with letters rearranged gives 'DECIMAL'.
'has its' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for decimal that I've seen before include "Sort of coinage" , "(System) based on tens" , "System based on ten" , "fraction" , "Using powers of ten" .)