Clue: Heroically, ecstatically proletarian: no hothead, no alternative (8)
Answer: EPICALLY
Explanation: Heroically, ecstatically proletarian: no hothead, no alternative (8)
**E**(u)**P**(h-or)**ICALLY **("ecstatically", with no U (non-U = "proletarian"), no H(ot) and no OR ("alternative)