Ridiculous figure not initially correct (5)
I believe the answer is:
right
'correct' is the definition.
(synonyms)
'ridiculous figure not initially' is the wordplay.
'ridiculous figure' becomes 'fright' (as in 'looking a fright').
'not initially' means to remove the first letter.
'fright' with its initial letter removed is 'RIGHT'.
(Other definitions for right that I've seen before include "licence" , "Correct; appropriate" , "The Tory side" , "Starboard side" , "Complete" .)