After 30+ years, most likely your original clock bezel has fallen apart, too brittle to be removed, or is completely gone. Here's a modern take on a replacement: Multi Jet Fusion printed out of Nylon PA12, this replacement bezel is meant to last. You can install it as is (original mounting hardware not included) or finish it however you desire.
AE86 Clock Bezel
Price each: $28.09
USPS Small Flat Rate Box Shipping to US Destinations: $9.45