Offense(red) have set up an iso in the centre of the pitch and defense have set up a clamp in the endzone
Disc is thrown to iso
Offender 4 cuts out for the disc (Note: no defender follows - they maintain the clamp)
One of the defender outside of the endzone will change to mark the person on the disc.
When another offender goes into the endzone that is the role of the clamp to cover them.
The clamp is essentially splitting the endzone in two. Defender 5 is covering the right half.
Defender 4 is covering the left half.
The clamp must communicate and work together to eliminate any threats