Note to get medicine (5)
I believe the answer is:
tonic
This clue is a double definition.
'note' is the first definition.
(type of note in a musical scale)
'medicine' is the second definition.
(I know that tonic is a type of medicine)
'to get' is the link.
(Other definitions for tonic that I've seen before include "__water; gin mixer" , "something providing a boost" , "A pick-me-up drink, nice with gin" , "something invigorating" , "Key" .)