Sharpener found in a bad mood (5)
I believe the answer is:
strop
I believe this is a double definition.
'sharpener' is the first definition.
(I know that strop is a type of sharpener)
'a bad mood' is the second definition.
(I've seen this before)
'found in' is the link.
(Other definitions for strop that I've seen before include "Razor-sharpener" , "Sharpen on piece of leather" , "Prime cutthroat" , "wobbly" , "Piece of leather on which razor is sharpened" .)