Necessitate (6)
'necessitate' is the definition.
(I know that entail is a more specific form of necessitate)
This is all the clue.
(Other definitions for entail that I've seen before include "Involve or require" , "Bring on an inevitable consequence" , "Cause" , "Estate settled" , "Invlove or necessitate" .)
'necessitate' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for oblige that I've seen before include "Compel, force" , "Perform a favour for" , "serve" , "Coerce or accommodate" , "Morally influence" .)
'necessitate' is the definition.
(I know that necessitate can be written as demand)
This is the entire clue.
(Other definitions for demand that I've seen before include "Claim; insist on" , "Request made emphatically as by right" , "Urgent or peremptory request" , "Claim as due or just" , "Request peremptorily, as a bill might" .)
'necessitate' is the definition.
(synonyms)
This is the entire clue.
'necessitate' is the definition.
(calling for is a kind of necessitating)
This is all the clue.
(Another definition for call for that I've seen is " Request".)
(Other definitions for obligate that I've seen before include "Compel (someone) to do moral/legal duty" , "By necessity" , "Force" .)