Supplant (5)
'supplant' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for replace that I've seen before include "Substitute for (someone)" , "Put something back where it belongs" , "Put back or substitute" , "Put back in original position" , "succeed" .)
'supplant' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for usurp that I've seen before include "Seize, take over" , "Supplant (someone in power)" , "Seize without right" , "Arrogate" , "Seize unlawfully" .)
'supplant' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for oust that I've seen before include "Put out, say of office" , "Force from office" , "Show the door to" , "Remove from a position or office" , "Extract" .)
'supplant' is the definition.
(synonyms)
This is all the clue.
(Other definitions for supersede that I've seen before include "Supplant, replace" , "Stop using" , "Take the place of, override" , "Take the place of, supplant" , "set aside" .)