--its own way 这里的“--”怎么理解?

问题描述:

--its own way 这里的“--”怎么理解?
The conflict involved the right of the South to leave the Union and deal with issues -- especially the issue of slavery -- its own way.
-- especially the issue of slavery是插入语吗?-- its own way前面是不是省略了in?

是插入语,补充issue;是省略了in,deal with issues (in) its own way.
in that/this/one's way 常省略in,但用于句首时不省略.