With 57-Across, unleash (3)
I believe the answer is:
let
(Other definitions for let that I've seen before include "Umpire's decision" , "Allow; tennis fault" , "Permit; lease" , "Permit or rent" , "Allow or lease" .)
I believe the answer is:
let
(Other definitions for let that I've seen before include "Umpire's decision" , "Allow; tennis fault" , "Permit; lease" , "Permit or rent" , "Allow or lease" .)