Connoisseur's glasses contain small measure with Greek character and lime zest (9)
I believe the answer is:
oenophile
'connoisseur's' is the definition.
(I've seen this before)
'glasses contain small measure with greek character and lime zest' is the wordplay.
I cannot quite understand how this works, but
'measure' could be 'ph' (pH is a kind of measure) and 'ph' is located in the answer.
'character' could be 'o' and 'o' is located in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for oenophile that I've seen before include "Wine buff" , "wine I enjoy" , "Drink lover" , "Lover of wine" , "Wine-lover" .)