Crossword Genius

Could be in the White House garden (4)

Ross

I believe the answer is:

bush

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

'garden' is the definition.
The answer and definition can be both groups as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'could be in the white house' is the wordplay.
I cannot quite understand how this works, but
'house' could be 'h' and 'h' is found in the answer.
The remaining letters 'bus' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for bush that I've seen before include "Scrub" , "41st US president, George" , "Low, woody plant" , "Shrub; protective sleeve" , "ex-president" .)

I've seen this clue in the Evening Standard.
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