Blooming Kate, drenching vegetable patch! (7,6)
I believe the answer is:
kitchen garden
'vegetable patch' is the definition.
('kitchen garden' can be a synonym of 'vegetable patch')
'blooming kate drenching' is the wordplay.
'blooming' indicates anagramming the letters (I've seen this in other clues).
'kate'+'drenching'='katedrenching'
'katedrenching' is an anagram of 'KITCHEN GARDEN'.
(Other definitions for kitchen garden that I've seen before include "Vegetable patch" , "Where to grow vegetables" , "Potager" , "Where vegetables etc are grown for one's own use" , "Vegetable plot" .)