Sentence:  Spearheaded by Charlie Parker, bebop, or just bop, had evolved in the 1940s, partly as an antidote to the crowd-pleasing showmanship (demeaning <WSD>minstrelry</WSD>, as they saw it) that was demanded in popular big band swing. 
Meaning of the word marked with <WSD> tags:  A simplified depiction of another culture, especially black African, for entertainment purposes, generally seen as offensive.