Smart superior wanting introduction (5)
I believe the answer is:
nobby
'smart' is the definition.
(thesaurus)
'superior wanting introduction' is the wordplay.
I cannot really see how this works, but
'wanting' could be 'no' (to want is to lack or have none of something) and 'no' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nobby that I've seen before include "Mr Clark(e)" , "Toff" .)