Crossword Genius

Conclusion can't be reached — sigh! (2,3,2,5)


I believe the answer is:

no end in sight

'conclusion can't be reached' is the definition.
(an end in sight is a conclusion)

I don't understand the remainder of the clue.

(Another definition for no end in sight that I've seen is " Lack of resolution so far".)

I've seen this clue in The Guardian.
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