12 letters Ballgame extenders ... and what can literally be found in the answers to the asterisked clues Answer: EXTRAINNINGS
12 letters Done in a quick but effective manner ... or like the answers to the three starred clues? Answer: DOWNANDDIRTY
12 letters *Philosopher who wrote "Out of the crooked timber of humanity, no straight thing was ever made" Answer: IMMANUELKANT
12 letters Breakfast brand since 1928 that hints at the starts of 20-, 33- and 43-Across Answer: RICEKRISPIES