Couple ain't prepared for embezzlement (10)
I believe the answer is:
peculation
'embezzlement' is the definition.
('peculation' can be a synonym of 'embezzlement')
'couple ain't prepared' is the wordplay.
'prepared' indicates anagramming the letters.
'couple'+'aint'='coupleaint'
'coupleaint' is an anagram of 'PECULATION'.
'for' acts as a link.
(Other definitions for peculation that I've seen before include "embezzlement" , "Misapplying" .)