Clue: Swell time, going after 1,000 in gold pieces (7)
Answer: AUGMENT
Explanation: Swell time, going after 1,000 in gold pieces (7)
**T**(ime) *going* *after* **G**(rand) ("1,000") *in* **Au** ("gold") **MEN** ("pieces" in chess, eg), so **Au-G-MEN-T