Of the nose (5)
I believe the answer is:
nasal
'of the nose' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nasal that I've seen before include "Like sounds of m, n, ng" , "description of Alain's vowels" , "piece of armour" , "Part of helmet" , "Relating to the nose" .)