Obscure group of women beginning to laugh coming in drunk (8)
I believe the answer is:
twilight
'obscure' is the definition.
(thesaurus)
'group of women beginning to laugh coming in drunk' is the wordplay.
'group of women' becomes 'wi' (Women's Institute).
'beginning to' indicates taking the first letters.
'coming in' means one lot of letters goes inside another.
'drunk' becomes 'tight' (I've seen this in other clues**).
The initial letter of 'laugh' is 'l'.
'wi'+'l'='wil'
'wil' going inside 'tight' is 'TWILIGHT'.
(Other definitions for twilight that I've seen before include "Condition of decline" , "semi-darkness" , "Period post-sunset" , "The last rays" , "Partial darkness" .)