Cultured dairy product mainly found on European island (4)
I believe the answer is:
skye
'island' is the definition.
(Scottish island)
'cultured dairy product mainly found on european' is the wordplay.
I cannot quite see how this works, but
'european' could be 'e' (abbreviation e.g. EU) and 'e' is located in the answer.
The remaining letters 'sky' is a valid word 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 skye that I've seen before include "Largest island of Scotland's Inner Hebrides" , "Portree island" , "Portree's isle" , "Where Bonnie Prince Charlie fled after his defeat at Culloden" , "Largest isle of the Inner Hebrides" .)