Old rag edited to some extent (4)
I believe the answer is:
aged
'old' is the definition.
(similar in meaning)
'rag edited to some extent' is the wordplay.
'to some extent' indicates a hidden word.
'AGED' is hidden within 'rag edited'.
(Other definitions for aged that I've seen before include "Like Uncle Arly" , "Long in the tooth" , "not like a callow youth" , "Geriatric" , "Advanced in years" .)