这里just that前面的逗号是表语气的停顿吗

A gap before “who” made clear that he did not mean previousAfrican-American candidates lacked cleanliness, just that they had been less“mainstream”.

请问老师这里just that前面的逗号是表语气的停顿吗?还是其他的使用方法。

he did not mean previous African-American candidates lacked cleanliness, just that they had been less “mainstream”.

just=only，simply. 只不过、只是

not A, just B. 并不是A，而只是B。