Illustration of India engraved in copper (3)
I believe the answer is:
pic
'illustration' is the definition.
(short for picture)
'india engraved in copper' is the wordplay.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'engraved in' indicates putting letters inside.
'copper' becomes 'pc'.
'i' inserted inside 'pc' is 'PIC'.
'of' is the link.
(Other definitions for pic that I've seen before include "film" , "Photograph (colloq.)" , "Photo (informal)" , "Photo (colloq.)" , "Image (abbr)" .)