Related Clues:

• I'm doctor's client, annoyed at waiting time?
• Mean tip -- it could make one poor as waiter
• On edge, tense
• I’m customer for a doctor that is restless
• Being nervous is difficult
• Restless or short-tempered
• Brat, tiny creature seizing man’s neckwear, wanting instant attention?
• Snappy declaration by doctor's client?
• In a hurry, maybe
• Any use when agitated or alarmed?
• Uncomfortable or apprehensive
• Any use being agitated and alarmed?
• 'I saw the hideous phantasm of a man […], stir with an ____, half vital motion' (Mary Shelley in Frankenstein)
• One minute -- case of doctor being in a hurry
• This compiler's transparent keeping yours truly keen