Clue: Women on stage overdoing hoax savage in act (4-3)
Answer: WHAM-BAM
Explanation: Definition: savage in act
W + HAM (overdoing things on stage + BAM (a hoax – this was new to me) – a reference to the phrase "wham, bam, thank you Ma'am", defined in Chambers as "quick impersonal sexual intercourse that brings speedy satisfaction to the male" , hence "savage in act"