Albums of offensive bum noises (9)
I believe the answer is:
omnibuses
'albums' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'offensive bum noises' is the wordplay.
'offensive' indicates an anagram (offensive implies disruption or upset).
'bum'+'noises'='bumnoises'
'bumnoises' anagrammed gives 'OMNIBUSES'.
'of' is the link.
Can you help me to learn more?
(Other definitions for omnibuses that I've seen before include "public transport" , "traffic on the roads" , "Large volumes" .)