Skin opening (4)
'skin opening' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for pore that I've seen before include "Rope around tiny hole" , "Minute opening in the skin" , "Closely study" , "Skin opening; look closely (over)" , "Sweat-gland opening" .)
(Other definitions for pope that I've seen before include "man of great authority" , "Bishop of Rome" , "Head of RC church" , "Vatican leader" , "Satirist" .)