Just answering to remove this question from the unanswered list.

Yes, questions asking to identify a sample used in a song are considered on-topic. Such questions are to use the identify-this-sample tag (but not the sample or sampling tags). Questions without enough details/research may be closed, though.

The current site policy (as of the date of this answer) on which ID questions are allowed can be seen here: Identification questions in general. What is allowed, and what is not?