The most common and most likely answer to this crossword clue is the 10 letter word EISENHOWER
I've seen this crossword clue in Financial Times
E
I
S
E
N
H
O
W
E
R
More clues leading to the result EISENHOWER
- US president plying heroes with wine
- Where one is misused in general
- Where one is distressed in general
- Where noise disturbed general
- Stormy on end of line – where is the president?
- Where one is involved as an ex-president
- Spain is nowhere special, Mr President
- In general, nowhere is safe ultimately at sea
- Giddy where one is president
- Incompetent one, where is US president?
Buddy explains!
The straight part
We know that "an ex-president" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case an ex-president = eisenhower.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.