Lacks necessities (5)
I believe the answer is:
needs
I believe this clue is a double definition.
'lacks' is the first definition.
(I've seen this in another clue)
'necessities' is the second definition.
('need' can be a synonym of 'necessity')
(Other definitions for needs that I've seen before include "Can't do without" , "Requirements" , "necessity once" , "Necessitates" , "'..... must when the devil drives'" .)