Rich? Go lay off government (9)
I believe the answer is:
oligarchy
'government' is the definition.
The definition and answer can be both groups as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'rich? go lay off' is the wordplay.
'off' indicates anagramming the letters.
'rich'+'go'+'lay'='richgolay'
'richgolay' is an anagram of 'OLIGARCHY'.
Can you help me to learn more?
(Other definitions for oligarchy that I've seen before include "Political system of government by a few people" , "Form of government with power held by a few" , "Rule of the few" , "a few men in government" , "Government by small elite" .)