Old article, quite battered (7)
I believe the answer is:
'old' is the definition.
(similar in meaning)
'article quite battered' is the wordplay.
'article' becomes 'an' (English indefinite article).
'battered' is an anagram indicator.
'quite' anagrammed gives 'tique'.
(Other definitions for antique that I've seen before include "of great age" , "Object that has acquired value with age" , "Valuable due to age, like some furniture" , "Age-old" , "from long ago" .)