In baking circles, it has all-round attractiveness (5)
I believe the answer is:
bagel
'in' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for bagel that I've seen before include "Ring-shaped bread product" , "Doughnut-shaped bread roll" , "Hard doughnut-shaped roll" , "Jewish baked roll" , "It's edible" .)