Satellite's antenna for broadcast, but not seen (5)
I believe the answer is:
ariel
'satellite's' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for ariel that I've seen before include "An airy spirit (Tempest)" , "Character pined once, unable to escape" , "Moon" , "Heavenly body" , "Swallows" .)