Come into being (11)
'come into being' is the definition.
('come into being'->'materialize' is in my internal thesaurus and 'ize'->'ise')
This is the entire clue.
'come into being' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arise that I've seen before include "Originate; get up" , "Happen" , "W B Yeats: 'I will . . . . . and go now'" , "Originate; stand up" , "Emerge" .)