Crossword Genius

A feature of Jamaica to regularly squander heaps on a large scale? (4,9)

Ross

I believe the answer is:

blue mountains

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

'a feature of jamaica to regularly squander heaps' is the definition.
I know nothing about this answer so I can't judge whether this works.

'a large scale?' is the wordplay.
I cannot quite understand how this works, but
'large' could be 'l' (eg in clothes sizes) and 'l' is present in the answer.
'scale?' could be 'mount' (scaling is a kind of mounting) and 'mount' is found in the answer.
This explanation may well be incorrect...

'on' is the link.

Can you help me to learn more?

I've seen this clue in The Times.
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