Ruddy loud member of the peerage, one's admitted (6)
I believe the answer is:
florid
'ruddy' is the definition.
(I've seen this before)
'loud member of the peerage one's admitted' is the wordplay.
'loud' becomes 'f' (short for forte - 'loud' in music).
'member of the peerage' becomes 'lord' (type of aristocrat).
'one' becomes 'i' (Roman numeral).
'admitted' is an insertion indicator (inserted letters get admitted).
'lord' going around 'i' is 'lorid'.
'f'+'lorid'='FLORID'
(Other definitions for florid that I've seen before include "Excessively ornamented" , "Excessively ornate" , "Ruddy in appearance" , "Elaborately intricate" , "With flushed complexion" .)