Yes they do have a CLERGY CLASS here is one evidence as captured in their manuals
Elders should be very careful not to divulge confidential matters.If an elder reveals the “confidential talk” of those in the congregation, he would lose their trust and ruin his reputation. (Prov.11:13)
When a son and publisher in the congregation disclose a sin he committed in a confidential talk to his father who is also a publisher in the congregation. Do the organization allow such CONFIDENTIALITY?
If no is the answer, can it be said Jehovah’s witnesses don't have a CLERGY CLASS? Is the keeping of confidential talk open to every member of the congregation or the clergy class aka elders, C. O, D. O e.t.c