It may bring a touching response when put out (6)

I believe the answer is:

feeler

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'it may bring a touching response when put out' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

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(Other definitions for feeler that I've seen before include "Tentative suggestion designed to elicit the reactions of others" , "Antenna or cautious suggestion" , "Appendage on the head of an insect" , "Antenna, tentacle" , "Insect's antenna" .)

I've seen this clue in the Evening Standard.

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