Get along fine mostly putting donkey in prestigious event (7)
I believe the answer is:
classic
'donkey in prestigious event' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'get along fine mostly' is the wordplay.
I cannot quite understand how this works, but
'fine' could be 'class' (I've seen this before) and 'class' is found in the answer.
This may be the basis of clue (or it may be nonsense).
'putting' is the link.
Can you help me to learn more?
(Other definitions for classic that I've seen before include "Definitive; of recognised excellence" , "Relating to early Greek and Latin writers" , "First-class" , "Timeless-quality work; a race" , "Of recognized excellence" .)