The most common and most likely answer to this crossword clue is the 9 letter word PALSGRAVE
I've seen this crossword clue in Financial Times
P
A
L
S
G
R
A
V
E
Buddy explains!

The straight part
We know that "Noble German" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case noble german = palsgrave.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 PALSGRAVE mean?
PALSGRAVE noun- A count palatinate of the Holy Roman Empire, possessing near-royal powers within his county.