Second embezzler is better (10)
I believe the answer is:
speculator
'is better' is the definition.
(I've seen this before)
'second embezzler' is the wordplay.
'second' becomes 's' (common abbreviation).
'embezzler' becomes 'peculator' ('peculator' can be a synonym of 'embezzler').
's'+'peculator'='SPECULATOR'
(Other definitions for speculator that I've seen before include "Investor in stocks, etc" , "Stock market gambler" , "One gambling on the stock exchange" , "better" .)