Send packing (3,2)
I believe the answer is:
let go
'send packing' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for let go that I've seen before include "sack" , "Dismiss (from ones thoughts?)" , "Release - relax one's grasp" , "Give up" , "Relinquish one's grip" .)