Unexpected delight (5)

I think it could be either:

Which length description are you looking for?:

4,5

treat

'unexpected delight' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for treat that I've seen before include "Entertain and pick up the tab" , "Joy" , "Deal with - delightful surprise" , "Entertain at one's own expense" , "Delightful outing; pay for (someone else)" .)

I've seen this clue in the Newsday.com and The New York Times.

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