It may be so wet and lonely in US park with geysers (11)
I believe the answer is:
yellowstone
'it may be so wet and lonely in us park with geysers' is the definition.
The definition suggests a singular noun which matches the answer.
'it may be so wet and lonely' is the wordplay.
'it may be' indicates anagramming the letters (I've seen this in other clues).
'and' means one lot of letters go next to another.
'so'+'wet'='sowet'
'sowet' after 'lonely' is 'lonelysowet'.
'lonelysowet' anagrammed gives 'YELLOWSTONE'.
Can you help me to learn more?
(Other definitions for yellowstone that I've seen before include "First US national park, 1872" , "Topaz, perhaps" , "US river" , "River with falls in Wyoming" .)