I wonder if it's sent- sounds like (upon instruction) scent, but only if scent follows from the preceding clue.
Send doesn't seem to explain all aspects in the clue, to me
You're probably right, Psybbo. It depends whether the 4 dots refer to the previous clue/answer or signify it's a 4 letter word to start the sentence. I'm just not convinced by the 'upon instruction' bit