Irritating worth (8,5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
nuisance value
(Other definitions for nuisance value that I've seen before include "Worth as a source of irritation" , "Capacity to cause trouble" , "Useful capacity to cause problem" , "Amount of inconvenience or annoyance that can be caused" , "How much trouble" .)