Cycling brand to make listening devices (4)
I believe the answer is:
ears
'listening devices' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for ears that I've seen before include "Organs of hearing" , "Locations for buds or studs?" , "Seed-bearing parts of corn" , "Shakespeare 'Friends, Romans, countrymen, lend me your . . . .'" , "One's hearing aids" .)