Where to say thanks for those lovely gardens (3)
I believe the answer is:
kew
'gardens' is the definition.
(Kew Gardens in London)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for kew that I've seen before include "SW London Gardens" , "Garden location" , "Location of the Royal Botanic Gardens in London" , "Botanic gardens site" , "part of London" .)