Dapper arrangement of teetotaller in negative (5)
I believe the answer is:
natty
'dapper' is the definition.
(I know that dapper can be written as natty)
'teetotaller in negative' is the wordplay.
'teetotaller' becomes 'tt' (abbreviation).
'in' is an insertion indicator.
'negative' becomes 'nay' (nay is a kind of negative).
'tt' placed into 'nay' is 'NATTY'.
'arrangement of' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for natty that I've seen before include "Smartly dressed" , "Smart, fashionable (colloq.)" , "Smart, spruce" , "Dapper (colloq.)" , "Stylishly dressed" .)