Feeler (8)
'feeler' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tentacle that I've seen before include "Flexible appendage on some animals" , "Long flexible feeler" , "Octopus's limb" , "Octopus feeler" , "Flexible grasping organ" .)
'feeler' is the definition.
(I know that feeler can be written as antenna)
This is all the clue.
(Other definitions for antenna that I've seen before include "Transmitting aerial" , "Radio aerial" , "Aerial - insect feeler" , "sensitive feeler" , "receiver" .)