Possible Clues:

• Fail to be a turncoat, we hear? It’s intrusive
• Weed failing to open cask with strong nuts
• Common or garden species of stork sang discordantly
• It’s blooming strong: ask for a fresh brew
• Sound way to keep in with fellow crooks in plant?
• Weed got roughed up in ranks, adapted and then succeeded
• Much-jointed common weed
• How to keep in with wrongdoers, say, in the plant?
• Difficulty faces informer - a plant