Discharge from nose not appropriate for anyone to see (4)
I believe the answer is:
snot
'discharge' is the definition.
(thesaurus)
'from nose not appropriate for anyone to see' is the wordplay.
I cannot really see how this works, but
'from' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
'not' could be 'nt' (synonyms) and 'nt' is found within the leftover letters.
A single letter 's' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for snot that I've seen before include "Mucus" , "Dog" , "Contemptible type" .)