Weary about teetotaller, English — laughed (8)
I believe the answer is:
tittered
'laughed' is the definition.
(tittering is a kind of laughing)
'weary about teetotaller english' is the wordplay.
'weary' becomes 'tired' ('tired' can be similar in meaning to 'weary'**).
'about' means one lot of letters goes inside another.
'teetotaller' becomes 'tt' (abbreviation).
'english' becomes 'e' (abbreviation).
'tt'+'e'='tte'
'tired' enclosing 'tte' is 'TITTERED'.
(Other definitions for tittered that I've seen before include "Giggled foolishly" , "Apparently found something amusing in rows" , "Laughed nervously or foolishly" , "Had a laugh" , "Gavce a high-pitched giggle" .)