Special rates for seeds (5)
I believe the answer is:
tares
'seeds' is the definition.
The answer and definition can be both plants as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'special rates' is the wordplay.
'special' indicates anagramming the letters.
'rates' with letters rearranged gives 'TARES'.
'for' is the link.
Can you help me to learn more?
(Other definitions for tares that I've seen before include "The weights of packaging" , "Stare at the vetches" .)