Preserve crumbling red column (5,4)
I believe the answer is:
lemon curd
'preserve' is the definition.
(lemon curd is a type of preserve)
'crumbling red column' is the wordplay.
'crumbling' indicates anagramming the letters.
'red'+'column'='redcolumn'
'redcolumn' with letters rearranged gives 'LEMON CURD'.
(Other definitions for lemon curd that I've seen before include "Thick yellow conserve" , "Yellow stuff" , "Thick, sweet spread" , "Yellow goo" .)