1: Sudden burst of energy
13: Michelangelo masterpiece
15: 'Spenser: For ___' (Urich series)
16: Impediment to getting high?
20: Stored to develop aroma, as tobacco
21: Superfluous something
24: Good, ironically, in slang
25: Hazarding a guess: manager of a political candidate?
31: Percussive off-Broadway hit
40: Intentionally kept concealed, as a motive
58: 'You ___?' (Lurch's query)
66: By no means long-winded