Remove additional ends of corset (7)
I believe the answer is:
extract
'remove' is the definition.
(thesaurus)
'additional ends of corset' is the wordplay.
'additional' becomes 'extra' (I've seen this before).
'ends of' says to hollow out the word (remove centre letters).
'corset' with its middle removed is 'ct'.
'extra'+'ct'='EXTRACT'
(Other definitions for extract that I've seen before include "Piece taken from a longer work" , "selection" , "Selected passage from a book" , "Take out with effort, say a tooth" , "Pull or take out - maybe a tooth" .)