Clonidine as an anti-hypertensive---is it an ACE inhibitor, arb, beta blocker? What class of medication is it in for hbp?

Cental alpha agonist. Clonidine acts on the central Alpha receptors and lowers sympathetic tone which lowers heart rate and blood pressure. Clonidine is not a good long term medication due to numerous side effects and ideally has be used for short duration only.