### Clue: Frenetic hospital psychiatric treatment requires intensive care (6)
### Answer: HECTIC 
 ### Explanation: Definition: Frenetic
 H(abbrev. for "hospital") + ECT(abbrev. for "electroconvulsive therapy", formerly known as electroshock treatment, usually used as a last resort treatment of severe psychiatric illnesses) **plus**(requires) IC(abbrev. for "intensive care").