Clue: Chicken satay and tikka starters at lunchtime, current in the western US (11)
Answer: YELLOWSTONE
Explanation: Definition: current in the western US
YELLOW (cowardly, chicken) + S[atay] + T[ikka] + ONE (o'clock, lunchtime). More familiar (to me, anyway) as the US national park, but it's named after the Yellowstone River ("current")