Horologist's task, a seasonal event (6,8)
I believe the answer is:
spring cleaning
'horologist's' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?
'task a seasonal event' is the wordplay.
I cannot really understand how this works, but
'a' could be 'an' and 'an' is present in the answer.
'event' could be 'ring' (ring is a kind of event) and 'ring' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for spring cleaning that I've seen before include "annual tidyup" , "Housework" .)