At Boxing Day party: earlier sick on a sherry (11)
I believe the answer is:
amontillado
'sherry' is the definition.
(amontillado is a kind of sherry)
'at boxing day party earlier sick on a' is the wordplay.
I cannot quite understand how this works, but
'at' could be 'on' (location) and 'on' is found in the answer.
'day' could be 'd' (abbreviation for day) and 'd' is located in the answer.
'party' could be 'l' and 'l' is found within the answer.
'a' 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 amontillado that I've seen before include "booze" , "Drink" , "Type of sherry" , "Kind of sherry" , "Pale sherry" .)