Requires (7)
'requires' is the definition.
('need' can be a synonym of 'require')
This is all the clue.
(Other definitions for needs that I've seen before include "Wants, requires" , "Requires, is in want of" , "Calls for" , "What is required" , "What we require" .)
'requires' is the definition.
('demand' can be a synonym of 'require')
This is all the clue.
(Other definitions for demands that I've seen before include "Requires" , "Asks peremptorily" , "Orders" , "Insistent requests" , "Insists upon" .)