### Clue: Sovereign introduced to metalworker? That's a fluke! (8)
### Answer: FLOUNDER 
 ### Explanation: Definition: a fluke
 L(symbol,£, for a pound sterling, the worth of a former gold coin;a sovereign in Britain) **contained in**(introduced to) FOUNDER(a worker who makes metal casings in a, well, foundry).
Answer: Aka a "fluke";a European flatfish.