Loopy sort of topic (5)
I believe the answer is:
picot
'loopy sort' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'of topic' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'topic' anagrammed gives 'PICOT'.
Can you help me to learn more?
(Other definitions for picot that I've seen before include "Loopy series" , "loopy decoration" , "Small embroidery loop" , "ornament" , "Small lace edging loop" .)