Exactly how one might first judge a wine? (2,3,4)
I believe the answer is:
on the nose
'exactly' is the definition.
(I know that exactly can be written as on the nose)
'one might first judge a wine?' is the wordplay.
I cannot really see how this works, but
an anagram of 'one' is 'eno' which is within the answer.
This may be the basis of the clue (or it may be nonsense).
'how' acts as a link.
Can you help me to learn more?
(Other definitions for on the nose that I've seen before include "There's a bridge here" , "where might a boxer's punch land?" , "where glasses are found?" , "where glasses rest" , "characteristic of glasses?" .)