-- Palace and Gardens, English Heritage property in the London borough of Greenwich (6)

I believe the answer is:

eltham

(Another definition for eltham that I've seen is " source of hope, we hear - with 30d".)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.