Coppers arrest fellows, using these?
I believe the answer is:
cuffs
'these?' is the definition.
The definition suggests an adverb but the answer is not.
'coppers arrest fellows' is the wordplay.
'coppers' becomes 'Cus' ('Cu' can be a synonym of 'copper').
'arrest' means one lot of letters goes inside another.
'fellows' becomes 'ff'.
'cus' going around 'ff' is 'CUFFS'.
'using' acts as a link.
Can you help me to learn more?
(Other definitions for cuffs that I've seen before include "boxes" , "Hits" , "Sleeve folds" , "Arresting items" , "They may have links" .)