Galatea’s keeping us waiting (4)

I believe the answer is:

late

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'galatea's keeping us waiting' is the definition.
I can't tell whether this definition defines the answer.

'galatea's keeping' is the wordplay.
'keeping' says the answer is hidden in the clue.
'LATE' is hidden in the letters of 'galatea'.

Can you help me to learn more?

(Other definitions for late that I've seen before include "Far on in the day" , "Delayed; dead" , "Dead or not punctual" , "No longer alive; tardy" , "Departed - behind time" .)

I've seen this clue in the Evening Standard.

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