Paint Dean Court ground (9)
I believe the answer is:
undercoat
'paint' is the definition.
(undercoating is a kind of painting)
'dean court ground' is the wordplay.
'ground' indicates an anagram ('grind' the letters into a new form).
'dean'+'court'='deancourt'
'deancourt' is an anagram of 'UNDERCOAT'.
(Other definitions for undercoat that I've seen before include "The first layer of paint" , "tin of paint?" .)