The most common and most likely answer to this crossword clue is the 7 letter word WHETTED
I've seen this crossword clue in Financial Times
W
H
E
T
T
E
D
More clues leading to the result WHETTED
Buddy explains!
The straight part
We know that "ground" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ground = whetted.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does WHETTED mean?
WHETTED verb- To hone or rub on with some substance, as a piece of stone, for the purpose of sharpening – see whetstone.
- To stimulate or make more keen.
- To preen.
- (of a surface) exposed to a working fluid