Possible Clues:

• Fowl split lengthways, opened out and grilled
• Inappropriately insert fowl
• Hit out in disagreement with director's preparation of The Birds?
• This chicken's a goner -- hit when going round area at maximum velocity
• Game bird split down the back and grilled
• Hit about a bit, cold chicken split
• Quarrel with mate about hot and cold chicken on grill
• Chicken split open and grilled — add a sentence or clause in an inappropriate place
• Chicken's bed about to be pinched by slug
• Bit of stuff and nonsense about dressing grilled fowl