### Clue: Separate dance numbers getting shocking treatment (10)
### Answer: DISCONNECT 
 ### Explanation: Definition: Separate
 DISCO(a party/a dance with people dancing to music that was particularly popular in the late 70s) + N,N(2 x abbrev. for "number") **plus**(getting) ECT(abbrev. for "electroconvulsive therapy", a mental health treatment in which small electric currents are passed through the brain, literally shocking the patient).
Defn: …/to sever links/connections with.