Made dull patios, one without any walls getting very high praise (9)
I believe the answer is:
adulation
'praise' is the definition.
(I have seen 'Fulsome praise ' mean 'adulation' so perhaps 'praise' could also mean 'adulation')
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for adulation that I've seen before include "pats on the back" , "Praise - flattery" , "Servile flattery" , "Worshipping" , "Adoration, idolisation" .)