Possible Clues:

• Informal expression for a very shy person
• A victim of lack of confidence, plant suffering from negative growth?
• Likely wallflower
• *Extreme introvert
• Psychiatrist unusually given toil by hesitant character
• One that's retiring in silk overnight for a change
• Timid sort sadly given toil when faced by psychiatrist
• Shy guy
• Shy type as ruler, surrounded by dreadful evil, in short
• Shy type, unexpectedly thriving, like son