Syrupy medicine (7)
I believe the answer is:
linctus
'syrupy medicine' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for linctus that I've seen before include "Cough medicine" , "Special formulation" , "Syrup that may see a cough off" , "Thick liquid medicine" , "Soothing drink" .)