Dish goddess and god briefly served up (7)
I believe the answer is:
ramekin
'dish' is the definition.
(I know that ramekin is a type of dish)
'goddess and god briefly served up' is the wordplay.
'goddess' becomes 'nike' (I have seen 'Goddess of victory ' mean 'nike' so perhaps 'goddess' could also mean 'nike').
'and' means one lot of letters go next to another.
'god briefly' becomes 'mar' (I can't justify this - if you can you should give a lot more credence to this answer).
'served up' is a reversal indicator (in a down clue, going upwards).
'nike'+'mar'='nikemar'
'nikemar' reversed gives 'RAMEKIN'.
Can you help me to learn more?
(Other definitions for ramekin that I've seen before include "Small fireproof dish used for baking and serving food" , "Small fireproof bowl" , "Small (savoury) dish for one person" , "Something to eat from" , "Small ovenproof dish" .)