Came in a convertible - feeble (7)
I believe the answer is:
anaemic
'feeble' is the definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?
'came in a convertible' is the wordplay.
'convertible' indicates an anagram.
'came'+'in'+'a'='cameina'
'cameina' anagrammed gives 'ANAEMIC'.
Can you help me to learn more?
(Other definitions for anaemic that I've seen before include "Suffering from a lack of red blood cells" , "Pale, weak in colour" , "uninspiring" , "Lacking vigour as in a cinema" , "Pale, sickly" .)