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' is a charade indicator (letters next to each other).
'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' is the 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" .)