Ron lists broken vents (8)
I believe the answer is:
nostrils
'vents' is the definition.
Although both the answer and definition are plural nouns, I cannot see how they can define each other.
'ron lists broken' is the wordplay.
'broken' indicates an anagram.
'ron'+'lists'='ronlists'
'ronlists' is an anagram of 'NOSTRILS'.
Can you help me to learn more?
(Other definitions for nostrils that I've seen before include "Openings in nasal cavities" , "Nose holes" , "Slit Ron's nose parts" , "Narial openings" , "Nose-openings" .)