Nature's new source of refreshment (3,4)
I believe the answer is:
tea urns
'source of refreshment' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'nature's new' is the wordplay.
'new' is an anagram indicator.
'natures' is an anagram of 'TEA-URNS'.
Can you help me to learn more?
(Other definitions for tea urns that I've seen before include "refreshments they provide" , "containers" .)