Fortune Tory keeps after taxes (3)
I believe the answer is:
net
'after taxes' is the definition.
(I've seen this before)
'fortune tory keeps' is the wordplay.
'keeps' indicates the answer is hidden within the clue.
'NET' can be found hidden inside 'fortune tory'.
(Other definitions for net that I've seen before include "Ultimate" , "After expenses" , "Lattice" , "Catch, ensnare" , "Catch -- after all deductions" .)