Compost of weeds for a vegetable product (5)
I believe the answer is:
swede
'a vegetable product' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'compost of weeds' is the wordplay.
'weeds' anagrams to 'SWEDE'.
But, I'm not clear how this is indicated.
'for' is the link.
Can you help me to learn more?
(Other definitions for swede that I've seen before include "Sort of turnip - one from Scandinavia?" , "Root vegetable - European" , "Man from Malmo" , "Scandinavian national" , "Cattle fodder" .)