Familiar with monarch but no aristocrat (8)
I believe the answer is:
commoner
'no aristocrat' is the definition.
(ordinary person as opposed to an aristocrat)
'familiar with monarch but' is the wordplay.
'familiar' becomes 'common' (synonyms).
'with' is a charade indicator (letters next to each other).
'monarch but' becomes 'er' (I can't explain this - if you can you should believe this answer much more).
'common'+'er'='COMMONER'
Can you help me to learn more?
(Other definitions for commoner that I've seen before include "Person not royal or of the nobility" , "more frequently encountered" , "Not a nobleman" , "certain type of undergraduate" , "Non-noble" .)