Want, require (4)
I believe the answer is:
need
This clue is a double definition.
'want' is the first definition.
(I know that want can be written as need)
'require' is the second definition.
(I know that require can be written as need)
(Other definitions for need that I've seen before include "privation" , "destitute state" , "must have results!" , "Want - poverty" , "Want - require(ment)" .)