As worn by a teetotaller with passion? (6)
I believe the answer is:
attire
'as worn by' is the definition.
I can't tell whether this defines the answer.
'a teetotaller with passion?' is the wordplay.
'teetotaller' becomes 'tt' (abbreviation).
'with' means one lot of letters go next to another.
'passion?' becomes 'ire' (ire is passionate anger).
'a'+'tt'+'ire'='ATTIRE'
Can you help me to learn more?
(Other definitions for attire that I've seen before include "Garments" , "(To) dress; fine clothes" , "Clothing, apparel" , "Clothing - tear it (anag)" , "Formal clothing" .)