Bright, having good fortune. Not half, with a bit of money (6)
I believe the answer is:
lucent
'bright' is the definition.
(similar in meaning)
'good fortune not half with a bit of money' is the wordplay.
'good fortune' becomes 'luck' (I've seen this in another clue).
'not half' means to take half the letters.
'with' is a charade indicator (letters next to each other).
'a bit of money' becomes 'cent'.
'luck' halved is 'lu'.
'lu'+'cent'='LUCENT'
'having' acts as a link.
(Other definitions for lucent that I've seen before include "Softly bright or radiant" , "Brilliant" , "Shining" , "'Lambent, luminous (6)'" .)