Wickedness by day in old Indian province (4)
I believe the answer is:
sind
'old indian province' is the definition.
'sind' can be an answer for 'province' (I have seen 'Pakistani province ' mean 'sind' so perhaps 'province' could also mean 'sind'). I am unsure of the 'old indian' bit.
'wickedness by day' is the wordplay.
'wickedness' becomes 'sin' (synonyms).
'by' says to put letters next to each other.
'day' becomes 'd' (abbreviation for day).
'sin'+'d'='SIND'
'in' is the link.
Can you help me to learn more?
(Other definitions for sind that I've seen before include "Karachi is its capital" , "Pakistani province" , "washing down with booze" .)