。
She has some kind of connection with that group.
Literal
She [topic-は] that group [with-と] some-kind-of relationship [subject-が] exists.
~と関係がある ('to have a relationship/connection with X') uses と to mark the other party in the relation. 何か ('something, some kind of') here serves as a vague modifier on 関係 — the speaker isn't specifying the nature of the link, only that it exists. Such deliberate vagueness is a frequent rhetorical move in Japanese: hinting without committing. The double-subject structure ([彼女は] [関係が]) places は on the topic and が on what exists, the textbook 'X has Y' frame.