Daughter remains in touch (4)
I believe the answer is:
dash
'touch' is the definition.
(I have seen 'A touch' mean 'dash' so perhaps 'touch' could also mean 'dash')
'daughter remains' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'remains' becomes 'ash' (remains of a fire).
'd'+'ash'='DASH'
'in' acts as a link.
(Other definitions for dash that I've seen before include "If you're smart, you'll cut one" , "Go quickly" , "Hurry ("must ____!")" , "Rush - elan" , "Vivacity" .)