Manipulate dishonestly (3)
I believe the answer is:
rig
'manipulate dishonestly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rig that I've seen before include "Set up; equipment" , "Arrangement of masts, spars and sails on a ship" , "uniform perhaps" , "Oil derrick" , "Oil-drilling device" .)