Twist somebody's arm, colloquially (8)
I believe the answer is:
persuade
(Other definitions for persuade that I've seen before include "Coax, prevail upon" , "Bring round" , "Cause (someone) to believe" , "Talk round" , "Convince by reasoning" .)
I believe the answer is:
persuade
(Other definitions for persuade that I've seen before include "Coax, prevail upon" , "Bring round" , "Cause (someone) to believe" , "Talk round" , "Convince by reasoning" .)