### Clue: Claiming to lose £1,000 over a bloomer (7)
### Answer: NIGELLA 
 ### Explanation: Definition: a 
theme connection: Nigella Lawson 
definition: the name of a flowering plant or "bloomer", also known as love-in-a-mist
 
ALLEGIN-G, losing a G ('G' for a grand, £1000), and reversed/"over"