Some made centuries, honest! (6)
I believe the answer is:
decent
'honest' is the definition.
(thesaurus)
'some made centuries' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'DECENT' is hidden in the letters of 'made centuries'.
(Other definitions for decent that I've seen before include "Obliging or modest" , "Modest and respectable" , "Appropriate, fitting" , "Moral, respectable" , "Seemly, respectable" .)