1: Late Greek god betraying no emotion (7)
6: In all, just a little peak. (3)
7: Fish in sea initially react to heat, perhaps (5)
8: Conductor of opera rising in encore (9)
10: Small area of land for unchanging Chinese (5)
12: Nightwear and jersey top added in afterthought (3)
13: Ace swallows pastry tart (7)