Insect antenna (6)
I believe the answer is:
feeler
'insect antenna' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for feeler that I've seen before include "Tentative proposal (to test someoneOs attitude)" , "Antenna or tendril" , "Antenna or cautious suggestion" , "Tentative proposal to gauge response; antenna" , "Antenna or cautious proposal" .)