After accepting the contract, if you look at the map, you will notice that there is a brand new circular restricted area over to the northwest with a red skull indicating the assassination target. This is in a raised rocky area overlooking part of the town below. Once you begin the contract, head over to the target location.

Approach the restricted zone from the street running past it on the west. From here you can scramble up a few rocky ledges and enter the guard post. Hide behind the crates at the top of your passage up and peek out from behind the corner. Whistle and perform a corner takedown on the closest guard. Next, move into the stalking zone and repeat with the other guards in the area.

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If you decide to take a more direct approach, double kill the two Brutes at the entrance and sneak up to the bushes. Whistle to the patrolling guard, take him down and move up to this location. If you put both guards to sleep you can then rush over to your target and finish the job.

From here, you should be able to spot a dirt path leading south, slightly uphill to your right. Activate Eagle Vision whilst looking up the path and you should identify your target. When you deem it safe to do so, sprint up the dirt slope and assassinate him to finalise the contract.