The most common and most likely answer to this crossword clue is the 9 letter word REICHSTAG
I've seen this crossword clue in The Times
R
E
I
C
H
S
T
A
G
More clues leading to the result REICHSTAG
- He gets upset with gastric diet
- Earl with his seat in wealthy, men-only parliament
- Wealthy stock speculator hedging European parliament
- Berlin building site founders touring Switzerland in torment
- Chairs get rearranged in German parliament once
- One of 4’s, wife finally bagged by eligible bachelor?
- A house in Germany ordered the cigars
- He with gastric upsets? It could be this diet
- Loaded, full of energy on venison diet in Germany once
- Chamber once putting right case wrong
Buddy explains!
The straight part
We know that "diet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case diet = reichstag.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.