A twit, very noisy and terribly rude to have about (6)
I believe the answer is:
duffer
'a twit very noisy' is the definition.
I can't judge whether this defines the answer.
'terribly rude to have about' is the wordplay.
'terribly' indicates an anagram.
'to have' means one lot of letters goes inside another.
'about' becomes 'ff' (I can't justify this - if you can you should give a lot more credence to this answer).
'rude' with letters rearranged gives 'duer'.
'duer' enclosing 'ff' is 'DUFFER'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for duffer that I've seen before include "Fogey" , "Incompetent person" , "Informally an inefficient person" , "Fed fur to foolish person" , "Useless old fellow" .)