Exciting to return 50% of wealth (8)
I believe the answer is:
electric
'exciting' is the definition.
(similar in meaning)
'return 50% of wealth' is the wordplay.
'return' becomes 'elect' (I've seen this before).
'50% of' means to take half the letters.
'wealth' becomes 'riches' (synonyms).
'riches' with half the letters taken is 'ric'.
'elect'+'ric'='ELECTRIC'
'to' acts as a link.
(Other definitions for electric that I've seen before include "Charged with sudden thrill" , "Mains-powered or thrilling" , "startling effect" , "as fans may be?" , "Type of chair, hare, shock etc" .)