The most common and most likely answer to this crossword clue is the 9 letter word PROBOSCIS
I've seen this crossword clue in The Daily Telegraph
P
R
O
B
O
S
C
I
S
More clues leading to the result PROBOSCIS
- Trunk for leader taking in Channel Islands
- Trunk‘s for governor protecting social centre
- Being born in phase of Scorpio’s an outstanding feature
- Nose for bad smell’s so backed up
- Nose about into old relative following endless search
- Boris cops perfidious snitch
- Such Scots breathe convulsively or pech at first climbing trunk
- Trunk call initially is supporting professional senior manager? Not entirely
- Elephant trunk expert is holding sort of pear
Buddy explains!

The straight part
We know that "Nose" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nose = proboscis.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 PROBOSCIS mean?
PROBOSCIS noun- An elongated tube from the head or connected to the mouth, of an animal.
- (mildly) A large or lengthy human nose.