Figure dish could serve as identifying plaque on vehicle, perhaps? (11)
I believe the answer is:
numberplate
'serve as identifying plaque on vehicle perhaps?' is the definition.
I can't tell whether this defines the answer.
'figure dish' is the wordplay.
'figure' becomes 'number' (I've seen this before).
'dish' becomes 'plate' (plate is a kind of dish).
'number'+'plate'='NUMBERPLATE'
'could' is the link.
Can you help me to learn more?
(Other definitions for numberplate that I've seen before include "Car registration" , "Car ID" .)