yea, i had an idea for a PC being approached by a politician about a contestant who is a competitors body guard and has an item of interest (key, decryptor, etc.) they would like pilfered, but either (havent been able to decide):
They have quite the eye for thieves and only would take off this item while in the ring
OR
That item is physically on their person, but since they have lightened up on restrictive/mandated clothing for the battle, the item is accessible and a person fighting would need to sneak it out to a thief hiding out under the arena battlegrounds during the fight