Existing (4)
(Other definitions for alive that I've seen before include "Animated and kicking" , "Quick - breathing" , "full of vitality" , "''Crying cockles and mussels, ..., ..., oh'' (Molly Malone)" , "Animated, on the ball" .)
'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 "Existing" , "Person" , "Living thing" , "substance" , "Existence" .)
'existing' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for real that I've seen before include "Actual, existing" , "foreign currency" , "Unaffected" , "Actual, not imagined" , "Not imaginary, genuine" .)