A rich and powerful type; that’s not applicable to Bob (5)
I believe the answer is:
nabob
'a rich and powerful type' is the definition.
I can't tell whether this defines the answer.
'not applicable to bob' is the wordplay.
'not applicable' becomes 'na' (this could be a standard abbreviation which I don't know about).
'na'+'bob'='NABOB'
'that's' is the link.
Can you help me to learn more?
(Other definitions for nabob that I've seen before include "Wealthy influential person" , "One divining (water)" , "he may be loaded" , "Devotional painting" , "Mogul governor; very rich or important person" .)