Crossword Genius

Surprise danger, high in alpine habitat? (4,6)

Ross

I believe the answer is:

rock garden

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

'high in alpine habitat?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'surprise danger' is the wordplay.
I cannot quite understand how this works, but
'surprise' could be 'rock' and 'rock' is found within the answer.
an anagram of 'danger' is 'garden' which is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Another definition for rock garden that I've seen is " horticultural feature".)

I've seen this clue in The Times and The Sunday Times.
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