Existing (5)
'existing' is the definition.
('be' can be a synonym of 'exist')
This is the entire clue.
(Other definitions for being that I've seen before include "Living thing" , "A matter of 9 in the play" , "Existing" , "See 9" , "substance" .)
'existing' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for real that I've seen before include "Actual; Brazilian currency" , "Genuine, not imitation" , "Substantial" , "Existing, not imaginery" , "Madrid FC; genuine" .)