Bit of unfinished business (5,3)

I think it could be either:

Which length description are you looking for?:

5,3

loose end

'bit of unfinished business' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for loose end that I've seen before include "Unsettled matter" , "As yet unexplained detail" , "unfinished work" , "'A detail not settled or explained (5,3)'" , "should have been tied?" .)

I've seen this clue in The New York Times.

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