Twenties girl - a noisy drinker (7)
I believe the answer is:
flapper
'twenties girl' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'a noisy drinker' is the wordplay.
'a noisy' becomes 'f'.
'drinker' becomes 'lapper' (I've seen this before).
'f'+'lapper'='FLAPPER'
Can you help me to learn more?
(Other definitions for flapper that I've seen before include "She was a flighty young thing" , "Unconventional young woman in the 1920s" , "20s fashionable woman" , "girl in 20s" , "fashionable female in twenties" .)