Pole wild about coating on eggnog ingredient (8)
I believe the answer is:
cinnamon
'ingredient' is the definition.
(cinnamon is a kind of ingredient)
'pole wild about coating on eggnog' is the wordplay.
I cannot really understand how this works, but
'pole' could be 'n' (abbreviation for North, as in North Pole) and 'n' is located in the answer.
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for cinnamon that I've seen before include "Yellowish-brown - spice" , "Something spicy" , "Yellow-brown spice from bark of Asian tree" , "spicy stuff" , "Spice from dried bark" .)