It may be present in March or April (6,3)

I believe the answer is:

easter egg

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'it may be present in march or april' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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(Other definitions for easter egg that I've seen before include "chocolate gift" , "Springtime confection" , "DVD feature?" , "festival food" , "Seasonal fare" .)

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

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