Modifies for a new use (6)
I believe the answer is:
adapts
'modifies for a new use' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for adapts that I've seen before include "Fits" , "Change to fit new circumstances" , "Converts to a different use" , "Converts to alternative use" , "Adjusts to new conditions" .)