VIP a bit of a joke? (7)
I believe the answer is:
someone
'vip' is the definition.
(both can mean an important person)
'a bit of a joke?' is the wordplay.
'a bit of' becomes 'some' (I've seen this in another clue).
'a joke?' becomes 'one' (as in 'that's a good one!').
'some'+'one'='SOMEONE'
(Other definitions for someone that I've seen before include "Important person" , "Celebrity" , "Unspecified person" , "Unspecified human being" , "A person (maybe of importance)" .)