Using Synchronize Directories in Asymmetric mode TC can delete single files on the right side. If set in the options, these will be deleted to the recycle bin.
To delete the files directly, you have to press Shift before pressing OK button in the "Synchronize" dialog.
Unfortunately, pressing Shift+"Yes"-button in the delete confirmation dialog has no effect yet (TC 7.02a).

to get a consistent behaviour in the different places
(as found out in this thread: Shift+"Yes"-button is detected after RMB -> "Delete (left/right/both)" is selected in Sync Dirs).