The most common and most likely answer to this crossword clue is the 4 plus 6 letter word OVAL OFFICE
I've seen this crossword clue in The Times
O
V
A
L
O
F
F
I
C
E
More clues leading to the result OVAL OFFICE
- Eggs and parasites covering rotten US executive's seat
- Old Gore has to speak out to Clinton — here?
- Harrison Ford and others worked here?
- Old throne room perhaps raised above another seat of power
- Cave if fool goes berserk in leader’s workplace
- Zero value aside, in case of emergency get to President's office
Buddy explains!
The straight part
We know that "US executive's seat" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case us executive's seat = oval office.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.