An impressive time of the year? (6)
I believe the answer is:
august
'an impressive' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for august that I've seen before include "Dignified - month" , "part of the year" , "Inspiring respect and admiration" , "Period in 1 down" , "Pale-faced fool" .)