"In the same place,” in footnotes (4)
I believe the answer is:
ibid
'in the same place in footnotes' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ibid that I've seen before include "(When citing a reference) in the same place (abbr)" , "Briefly, in the same book or passage" , "(With written references) in the same place (Latin)" , "'In the same place as previously mentioned, in short (4)'" , "In the same place (L)" .)