Daughter taking bucket down to sink (5)
I believe the answer is:
drain
'sink' is the definition.
(thesaurus)
'daughter taking bucket' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'taking' means one lot of letters go next to another.
'bucket' becomes 'rain' (eg bucketing down means raining).
'd'+'rain'='DRAIN'
'down to' is the link.
(Other definitions for drain that I've seen before include "Something using up resources" , "Wasted down here" , "Culvert" , "Make weak" , "Waste channel" .)