The most common and most likely answer to this crossword clue is the 7 letter word TERRAIN
T
E
R
R
A
I
N
More clues leading to the result TERRAIN
- Aquatic reptile avoiding soft ground
- Queen going by rail to see the lie of the land
- Turtle avoiding soft ground
- Ground where queen buried in school
- Turtle avoids soft tract of land
- Relative of tortoise quietly lost ground
- Ruler found in school ground
- Blunder amid cheers at home ground
- Come down after end of flight and what should I do? Land!
- Prepare Queen to come in to land
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 = terrain.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 TERRAIN mean?
TERRAIN noun- A single, distinctive rock formation; an area having a preponderance of a particular rock or group of rocks.
- An area of land or the particular features of it.