Crossword Genius

US leaders shown up here? (8)

Ross

I believe the answer is:

rushmore

I'm a little stuck... Click here to teach me more about this clue!

'leaders shown up here?' is the definition.
The definition suggests a singular noun which matches the answer.

'us' is the wordplay.
I cannot quite see how this works, but
'us' is within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for rushmore that I've seen before include "Rock figureheads here" , "Mountain with carvings of US presidents" , "Mount . . . . . . . . in USA has carved heads of presidents" , "US mountain with carved heads of presidents" , "Mount with presidential statuary" .)

I've seen this clue in The Sun.
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