Again water dry earth, ground close to hedge (9)
I believe the answer is:
rehydrate
'again water' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'dry earth ground close to hedge' is the wordplay.
'ground' is an anagram indicator ('grind' the letters into a new form).
'close to' indicates one should take the final letters (the close/ending of).
The final letter of 'hedge' is 'e'.
'dry'+'earth'='dryearth'
'dryearth' is an anagram of 'rehydrat'.
'rehydrat'+'e'='REHYDRATE'
Can you help me to learn more?
(Another definition for rehydrate that I've seen is " Add water to (a dried substance)".)