Hit hard and take into custody (4)
I believe the answer is:
cuff
This clue could be a double definition.
'hit hard' is the first definition.
'cuff' can be an answer for 'hit' (I've seen this before). I am not certain of the 'hard' bit.
'take into custody' is the second definition.
(I've seen this in another clue)
'and' acts as a link.
Can you help me to learn more?
(Other definitions for cuff that I've seen before include "[SLEUTH]" , "Light blow with the open hand" , "Turned-back hem to sleeve" , "Smack; end of shirt sleeve" , "A slap" .)