Notaries not leaving when given sign (5)

I believe the answer is:

aries

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'given sign' is the definition.
'aries' can be an answer for 'sign' (star sign). I am not sure about the 'given' bit.

'notaries not leaving' is the wordplay.
'leaving' indicates named letters should be taken away.
'notaries' with 'not' taken out is 'ARIES'.

'when' acts as a link.

Can you help me to learn more?

(Other definitions for aries that I've seen before include "star group" , "Philip -, English poet" , "A sign from Heaven" , "House" , "First sign of the zodiac" .)

I've seen this clue in The Irish Times.

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