Be in a sort of cold confection (6)
I believe the answer is:
sorbet
'cold confection' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'be in a sort' is the wordplay.
'in' means one lot of letters goes inside another.
'be' placed inside 'sort' is 'SORBET'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for sorbet that I've seen before include "Water ice dessert" , "Mushy ice drink to cleanse the palate" , "Refresher course" , "Strobe (anag.)" , "Frozen dessert" .)