Crossword puzzle clue "exploratory excursion that happens after dark"

Exploratory excursion that happens after dark

"For his contributions to jazz, ___ should be smeared with bacon grease, placed in a cage with three underfed Kodiak grizzly bears, and whatever happens, happens." ("Genius Guide to Jazz")

"Whatever happens, happens"

Entertainment offering that happens after dark

Work period that happens after dark

Religious ritual that happens after dark

Source of "Say! In the dark? Here in the dark! Would you, could you, in the dark?"

Org. doing exploratory work