Tentative suggestions put out by some animals? (7)

I believe the answer is:

feelers

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'tentative suggestions' is the definition.
'feelers' can be an answer for 'suggestions' (feeler is a kind of suggestion). I'm not sure about the 'tentative' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for feelers that I've seen before include "Tentative exploration" , "horns" , "Antennae or cautious proposals" , "Probes" .)

I've seen this clue in The Globe and Mail.

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