Wednesday turning somewhat dark, women scream (7)
I believe the answer is:
midweek
'wednesday' is the definition.
(I've seen this before)
'turning somewhat dark women scream' is the wordplay.
'turning' says the letters should be written in reverse.
'somewhat dark' becomes 'dim'.
'women' becomes 'w'.
'scream' becomes 'eek'.
'dim' written backwards gives 'mid'.
'mid'+'w'+'eek'='MIDWEEK'
(Other definitions for midweek that I've seen before include "Tuesday to Thursday?" , "Normal working day(s)" , "Wednesday (or thereabouts)" .)