Part of the eye contaminated by small amount of Greek wine (7)
I believe the answer is:
retsina
'greek wine' is the definition.
(I've seen this in another clue)
'part of the eye contaminated by small amount' is the wordplay.
I cannot quite see how this works, but
'part' could be 'si' (si is a kind of part) and 'si' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'amount' could be 'en' (en is a kind of amount) and 'en' is found in the remaining letters.
The remaining letters 'ra' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for retsina that I've seen before include "Greek resin-flavoured wine" , "S European wine" , "Nastier (anag) - white (or rose) wine" , "Type of Greek wine" , "Greek wine - nastier sort" .)