What does the cryptic crossword clue "In the ’60s, partygoers sacked women entertainers (7)" mean?

The definition is "entertainers". The wordplay uses a deletion. SINGERS (deletion) = SINGERS; definition: "entertainers" The answer is SINGERS.

In the ’60s, partygoers sacked women entertainers (7)

Guardian Cryptic #28989 | 28 Across | 2023-02-09 flower