Required, wanted (6)
I believe the answer is:
needed
I believe this clue is a double definition.
'required' is the first definition.
(I know that required can be written as needed)
'wanted' is the second definition.
(needing is a kind of wanting)
(Other definitions for needed that I've seen before include "Required; sounds like worked (dough)" , "Obligatory" , "Was in want of" , "Lacked something essential" , "Missing" .)