Subsequently, in that case (4)

I believe the answer is:

then

This clue is a double definition.

'subsequently' is the first definition.
('then' can be a synonym of 'subsequently')

'in that case' is the second definition.
('then' can be a synonym of 'in that case')

(Other definitions for then that I've seen before include "Afterwards - as a result" , "soon?" , "Consequently" , "Once upon a time" , "At that time; next" .)

I've seen this clue in the Evening Standard.

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