Air sounds freaked out such old fogeys (9)
I believe the answer is:
dinosaurs
'old fogeys' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.
'air sounds freaked out' is the wordplay.
'freaked out' is an anagram indicator (I've seen 'freaking out' mean this (I've seen this in other clues)).
'air'+'sounds'='airsounds'
'airsounds' with letters rearranged gives 'DINOSAURS'.
'such' is the link.
Can you help me to learn more?
(Other definitions for dinosaurs that I've seen before include "Oddly, US inroads are being made into finding these creatures" , "Jurassic reptiles" , "Extinct terrestrial reptiles" .)