Grand weeks wasted in botanical display (3,7)

I believe the answer is:

kew gardens

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'botanical display' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'grand weeks wasted' is the wordplay.
'wasted' indicates an anagram.
'grand'+'weeks'='grandweeks'
'grandweeks' anagrammed gives 'KEW GARDENS'.

'in' is the link.

Can you help me to learn more?

(Other definitions for kew gardens that I've seen before include "London botanic centre" , "royal park" , "London botanical park" .)

I've seen this clue in The Daily Express.

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