Miserable daughter back (5)
I believe the answer is:
drear
'miserable' is the definition.
(I've seen this before)
'daughter back' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'back' becomes 'rear' (something's rear is its back).
'd'+'rear'='DREAR'
(Other definitions for drear that I've seen before include "Dismal (literary)" , "Grim" , "Gloomy and cheerless" , "miserable" , "grave" .)