Small donkey died and reeked (6)
I believe the answer is:
smoked
'reeked' is the definition.
(reek can mean to emit smoke)
'small donkey died' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'donkey' becomes 'moke' (moke can informally mean a donkey).
'died' becomes 'd' (abbreviation next to the year of someone's death).
's'+'moke'+'d'='SMOKED'
'and' is the link.
(Other definitions for smoked that I've seen before include "Fumigated; cured" , "Dried and cured by hanging in wood vapour" , "Dried and cured by hanging in wood fumes" , "(Of salmon) cured" , "Had a cigarette" .)