Otherwise (4)

There are a few possibilities for this:

Which length description are you looking for?:

3 4 6 2,3

2,4

or else

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

This is the entire clue.

(Other definitions for or else that I've seen before include "Vague threat" , "If not, then - vaguely threatening" , "Otherwise - that's a threat" , "Statement that threatens" , "If not, then - sounds like a threat" .)

I've seen this clue in The Mirror, the Evening Standard and the USA Today.

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