Answer: lucubration

AnswerCrossword Clue
lucubrationlaborious or intensive study
lucubrationthe result of such activity, as a learned speech or dissertation
lucubrationlaborious work, study, thought, etc., esp. at night
lucubrationlaborious work, study, thought, etc., esp. at night.
lucubrationany literary effort, esp. of a pretentious or solemn nature