Yes, you have it.

 

Buried plague stones not intended to be a permanent feature (5)

 

WORDPLAY

Buried <- [hidden word indicator]

{plague stones} -> gue st

WHOLE DEF

not intended to be a permanent feature = guest

 

Over to you, nfs.

The portal has added what remains.

(8 letters)

The portal has added what remains.

(8 letters)

 

_ _ _ _ _ _ e _

 

 

The portal has added what remains.

(8 letters)

 

_ _ _ _ a _ e _

 

The portal has added what remains.

(8 letters)

 

_ _ t _ a _ e _

Extranet …?

 

Yes countess.

Reflect upon being the one ruling article (5)