Has an appreciation for what goes into port and its make-up?
I believe the answer is:
eyeliner
'make-up?' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for eyeliner that I've seen before include "Facial cosmetic" , "Makeup for the peepers" , "highlight for look-out" , "Make-up item" , "Item of 25dn" .)