New money must include a plutocrat (5)
I believe the answer is:
nabob
'plutocrat' is the definition.
(both can mean a rich or powerful person)
'new money must include a' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'money' becomes 'bob' (historical coin).
'must include' means one lot of letters goes inside another.
'n'+'bob'='nbob'
'nbob' placed around 'a' is 'NABOB'.
(Other definitions for nabob that I've seen before include "Powerful man" , "very wealthy man" , "Mogul governor; very rich or important person" , "Wealthy and powerful person" , "VIP" .)