Inebriate daughter, after dash in dark, collapsed (8)
I believe the answer is:
drunkard
'inebriate' is the definition.
('drunkard' can be a synonym of 'inebriate')
'daughter after dash in dark collapsed' is the wordplay.
'daughter' becomes 'd'.
'after' means one lot of letters go next to another.
'dash' becomes 'run' (I've seen this before**).
'in' indicates putting letters inside.
'collapsed' indicates an anagram.
'dark' is an anagram of 'kard'.
'run' put within 'kard' is 'runkard'.
'd'+'runkard'='DRUNKARD'
(Other definitions for drunkard that I've seen before include "Toper, sot, lush" , "alkie" , "Sot, addicted drinker" , "One gets soaked" , "boozer" .)