### Clue: Head doctor immerses wound on time (9)
### Answer: MESMERIST 
 ### Explanation: Definition: Head doctor
 **Anagram of**(… wound) IMMERSES **plus**(on) T(abbrev. for "time").
Defn: A practitioner of Mesmerism, after F.A. Mesmer, who theorised that there was an invisible natural force that could be used to heal by inducing a hypnotic stupor on the patient, hence a "head doctor".