Common or garden species of stork sang discordantly (9)
I believe the answer is:
knotgrass
'common or garden species' is the definition.
'stork sang discordantly' is the wordplay.
'discordantly' indicates anagramming the letters.
'stork'+'sang'='storksang'
'storksang' with letters rearranged gives 'KNOTGRASS'.
'of' acts as a link.
(Other definitions for knotgrass that I've seen before include "Weed" , "plant" .)