Insect's antenna (6)
I believe the answer is:
feeler
'insect's 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 gauge response; antenna" , "Antenna or cautious suggestion" , "Antenna or tendril" , "sensation seeker" , "Tentative suggestion designed to elicit the reactions of others" .)