Antennae (7)
'antennae' is the definition.
('aerial' can be a synonym of 'antenna')
This is the entire clue.
(Other definitions for aerials that I've seen before include "Receivers" , "They're on the roof for reception" , "Antennae or transmission rods" , "Antennas" .)
(Other definitions for feelers that I've seen before include "Probes" , "horns" , "Tentative exploration" , "Antennae or cautious proposals" .)