Exciting description of a crowded Sports Day (8)
I believe the answer is:
eventful
'exciting' is the definition.
(I've seen this before)
'description of a crowded sports day' is the wordplay.
I cannot really understand how this works, but
'day' could be 'eve' (eve is a kind of day) and 'eve' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for eventful that I've seen before include "Containing many incidents" , "Full of noteworthy incidents" , "Busy, exciting (period)" , "Busy, lively" , "Packed with action, lots happening" .)