Nominal figure all right to be accepted (5)
I believe the answer is:
token
'nominal' is the definition.
('token' can be a synonym of 'nominal')
'figure all right to be accepted' is the wordplay.
'figure' becomes 'ten' (I've seen this in other clues).
'all right' becomes 'ok' ('ok' can be a synonym of 'all right').
'to be accepted' indicates putting letters inside.
'ten' placed around 'ok' is 'TOKEN'.
(Other definitions for token that I've seen before include "Nominal, slight" , "Indication, symbol or voucher" , "Keepsake or memorial as of friendship" , "Sign, symbol or an evidence" , "Money substitute" .)