The most common and most likely answer to this crossword clue is the 11 letter word KNEE-LENGTH
I've seen this crossword clue in The Guardian
K
N
E
E
-
L
E
N
G
T
H
More clues leading to the result KNEE-LENGTH
Buddy explains!
The straight part
We know that "Such as would suit you down to the ground? Only half" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case such as would suit you down to the ground? only half = knee-length.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 KNEE-LENGTH mean?
KNEE-LENGTH adjective- (of clothing) Reaching to the knee.