Clue: After short time, lines put over end of dinghy producing fish (5)
Answer: MOLLY
Explanation: Definition: fish
MO (short time) + LL + [dingh]Y. Perhaps a rather obscure definition – it's a genus of fish from the Americas – but it's clearly clued. Molly Bloom's name is probably a reference to the magic herb Moly, which was given to Odysseus to protect him from the magic of Circe