Crossword Genius

Updated version of Grease gets bonus features (6,4)

Ross

I believe the answer is:

easter eggs

I'm a little stuck... Click here to teach me more about this clue!

'bonus features' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.

'updated version of grease gets' is the wordplay.
'grease gets' can be anagrammed to 'EASTER EGGS'.
But, I am not clear how this is indicated.

Can you help me to learn more?

(Another definition for easter eggs that I've seen is " seasonal gifts".)

I've seen this clue in The Times.
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