### Clue: Live performances involving Australian women at top of two large power units (9)
### Answer: GIGAWATTS 
 ### Explanation: Definition: large power units
 GIGS(live music performances) **containing**(involving) [A(abbrev. for "Australian") + W(abbrev. for "women") + AT + **1st letter of**(top of, in a down clue) "two"].
Defn: …, units of measurement of power, that is.