Choose a bloomer, reportedly for hot sauce (10)
I believe the answer is:
piccalilli
'sauce' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Maybe there's a link between them I don't understand?
I cannot understand how the remainder of the clue works.
(Other definitions for piccalilli that I've seen before include "Hot pickle" , "Spicy relish" , "Chopped vegetables, mustard and hot spices" , "Spicy pickle" , "Relish with chopped pickled cucumbers, green peppers and onion" .)