strange dog debts (7)

All yours, countess

More clues

Still, on one hand the fellow drops in for a quiet exchange, admits the idiot (7)

There are two charades, a letter exchange, a containment. (Two main charades, but also a single letter abbr and single letter charade, for the letter exchange.) 

[charade] [abbr] [letter substitution indicator…->] [charade] [<-…] [containment indicator] {charade}

The container has a letter substituted by another letter, and then the containment takes place.

_a____e

Passive...?

I hear he shoots to deaden outside.

(8 letters)

I hear he shoots to deaden outside.

(8 letters)

_ _ _ _ _ _ _ s