Bishop can start to disregard rule in place for fox hunting? (5,5)

'fox hunting?' is the definition.
'blood sport' can be an answer for 'hunting?'. I'm not sure about the 'fox' bit.

'bishop can start to disregard rule in place' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'can' becomes 'loo' (slang).
'start to' indicates taking the first letters.
'rule in place' becomes 'sport' (I can't explain this - if you can you should believe this answer much more).
The initial letter of 'disregard' is 'd'.
'b'+'loo'+'d'+'sport'='BLOOD SPORT'

'for' acts as a link.

Can you help me to learn more?