Appear to have left nothing good (4)
I believe the answer is:
look
'appear' is the definition.
(synonyms)
'left nothing good' is the wordplay.
'left' becomes 'l' (common abbreviation).
'nothing' becomes 'O' (looks like zero - 0).
'good' becomes 'ok'.
'l'+'o'+'ok'='LOOK'
'to have' is the link.
(Other definitions for look that I've seen before include "Peer" , "Mien" , "See - air" , "Get an eyeful" , "Facial expression" .)