Arrest at some difficulty? (5)
I believe the answer is:
pinch
I believe this is a double definition.
'arrest' is the first definition.
(I know that arrest can be written as pinch)
'some difficulty?' is the second definition.
(pinch is a kind of difficulty)
'at' acts as a link.
(Other definitions for pinch that I've seen before include "Squeeze between the fingers" , "Grip sharply; steal" , "Nip - purloin" , "Pilfer" , "Squeeze painfully" .)