Being Turkish, is sweet (7)
I believe the answer is:
delight
'sweet' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'being turkish' is the wordplay.
I cannot really see how this works, but
'being' could be 'light' (light is a kind of being) and 'light' is found in the answer.
This may be the basis of clue (or it may be nonsense).
'is' acts as a link.
Can you help me to learn more?
(Other definitions for delight that I've seen before include "Give great pleasure to" , "Please highly" , "Transport - please" , "Happiness" , "Gladness" .)