Scrounge from bishop prior to arrest (4)
I believe the answer is:
blag
'scrounge' is the definition.
(I've seen this before)
'bishop prior to arrest' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'prior to' means one lot of letters go next to another.
'arrest' becomes 'lag' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'b'+'lag'='BLAG'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for blag that I've seen before include "Obtain by clever talk or lying" , "Get something for free by lying" , "Use clever talk to obtain something" , "Somehow obtain" , "Obtain by guile" .)