Tentacle (6)

I believe the answer is:

feeler

'tentacle' is the definition.
(I know that feeler is a type of tentacle)

This is all the clue.

(Other definitions for feeler that I've seen before include "Tentative proposal to gauge response; antenna" , "Insect's antenna" , "Antenna or cautious suggestion" , "Tentative proposal (to test someoneOs attitude)" , "Sensing organ" .)

I've seen this clue in the Evening Standard and The Mirror.

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