Sound of quarrel among directors leaving one thoroughly fed up (5,5)
I believe the answer is:
bored stiff
'sound' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'quarrel among directors leaving one thoroughly fed up' is the wordplay.
I cannot really understand how this works, but
'quarrel' could be 'tiff' (informal term for an argument) and 'tiff' is found in the answer.
'fed up' could be 'bored' (fed up can mean bored) and 'bored' is found within the answer.
A single letter 's' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for bored stiff that I've seen before include "Very fed up" , "Extremely uninterested" , "Suffering tedium" .)