The most common and most likely answer to this crossword clue is the 6 plus 3 letter word NUMBER TEN
I've seen this crossword clue in The Daily Telegraph
N
U
M
B
E
R
T
E
N
More clues leading to the result NUMBER TEN
- Names covering brown walls of the famous residence
- Enter nervously following insensitive political address?
- Feeling less clear about famous residence
- Last but one in political residence
- Where top Tory is less sensitive after tax rises
- Last but one team member in political residence?
- May is here — figure to catch up
- Fish container upside down under freezer door for 20dn and co
- X marks the spot in a political address
- Premier building for tail-ender
Buddy explains!

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.