Object of worship in Delhi or Lahore principally (4)
I believe the answer is:
idol
'object of worship' is the definition.
(I've seen this before)
'in delhi or lahore principally' is the wordplay.
'principally' suggests taking the first letters.
The initial letters of 'in delhi or lahore' is 'IDOL'.
(Other definitions for idol that I've seen before include "Object of excessive adoration" , "A graven image or object of adoration" , "loved one" , "Effigy" , "Pin-up" .)