Person eating with much noise and little ceremony (5)
I believe the answer is:
diner
'person eating' is the definition.
(I've seen this before)
'with much noise and little ceremony' is the wordplay.
'with' means one lot of letters go next to another.
'much' means to remove the last letter (much but not all of the word).
'noise' becomes 'din' (din can mean a loud noise or disturbance).
'and' becomes 'n' (common abbreviation for 'and').
'little ceremony' becomes 'er' (I can't justify this - if you can you should believe this answer much more).
'din' with its last letter taken off is 'di'.
'n'+'er'='ner'
'di' next to 'ner' is 'DINER'.
Can you help me to learn more?
(Other definitions for diner that I've seen before include "(Person eating in) restaurant" , "American cafe" , "Restaurant customer" , "one at banquet?" , "American restaurant" .)