Initially coiled organs contained hairs, later enabling auricular evolution (8)

'initially coiled organs contained hairs later enabling auricular evolution' is the definition.
I can't judge whether this defines the answer.

'initially coiled organs contained hairs later enabling auricular evolution' is the wordplay.
'initially' indicates taking the first letters.
'later enabling auricular evolution' becomes 'leae' (this might be a standard abbreviation of which I'm unaware).
The initial letters of 'coiled organs contained hairs' is 'coch'.
'coch'+'leae'='COCHLEAE'

Can you help me to learn more?