Clue: Rector apparently camping at religious council (5)
Answer: TRENT
Explanation: Rector apparently camping at religious council (5)
**R** (rector) in **TENT** (if you're in a tent you're camping) 
*The Council of Trent between 1545 and 1563 in Trent (or Trento, in northern Italy), was the 19th ecumenical council of the Catholic Church. and has been described as the embodiment of the Counter-Reformation.