Crossword Genius

Excursion ending at nightfall (3,4)

Ross

I believe the answer is:

day trip

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'excursion' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for day trip that I've seen before include "Outing" , "Excursion within 24 hours" , "Brief excursion" , "Pay dirt (anag.)" .)

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