Nominal figure about right (5)
I believe the answer is:
token
This might be a double definition.
'nominal' is the first definition.
(I know that nominal can be written as token)
'figure about right' is the second definition.
'token' can be an answer for 'figure' (thesaurus). I'm not sure about the 'about right' bit.
Can you help me to learn more?
(Other definitions for token that I've seen before include "without meaning it" , "Done only as a symbolic gesture" , "Keepsake or memorial as of friendship" , "Done for appearance's sake" , "Counter" .)