Called for (6)
'called for' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Another definition for warranted that I've seen is " Justified or guaranteed".)
'called for' is the definition.
('need' can be a synonym of 'call for')
This is the entire clue.
(Other definitions for needed that I've seen before include "Lacked something essential" , "Required; sounds like worked (dough)" , "Was in want of" , "Missing" , "Essential; called for" .)