Lush part of meadow in Oxfordshire (4)
I believe the answer is:
wino
'lush' is the definition.
(thesaurus)
'part of meadow in oxfordshire' is the wordplay.
'part of' indicates a hidden word.
'WINO' is hidden in the letters of 'meadow in oxfordshire'.
(Other definitions for wino that I've seen before include "Lush" , "Toper" , "Alcoholic" , "Down-and-out drunkard" , "Habitual drunkard" .)