Carol's bleak time?
I believe the answer is:
midwinter
This clue might be a double definition.
'carol's' is the first definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
'bleak time?' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for midwinter that I've seen before include "height of season?" , "Date of holy birth" , "Bleakest time of year?" .)