One's tender in the same place (4)
I believe the answer is:
ibid
'in the same place' is the definition.
(I've seen this before)
'one's tender' is the wordplay.
'one' becomes 'i' (Roman numeral).
'tender' becomes 'bid' ('bid' can be a synonym of 'tender').
'i'+'bid'='IBID'
(Other definitions for ibid that I've seen before include "(When citing a reference) in the same place (Latin)" , "(When citing a reference) in the same place (abbr)" , "In the same place (Latin abbr)" , "Briefly, in the same book or passage" , "(With written references) in the same place (Latin)" .)