Daughter is left after mother gets gloomy (6)
I believe the answer is:
dismal
'gloomy' is the definition.
(I know that gloomy can be written as dismal)
'daughter is left after mother' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'left' becomes 'l' (common abbreviation).
'after' says to put letters next to each other.
'mother' becomes 'ma' (ma can mean mother).
'l' after 'ma' is 'mal'.
'd'+'is'+'mal'='DISMAL'
'gets' is the link.
(Other definitions for dismal that I've seen before include "of poor quality" , "'Gloomy, grim (6)'" , "Dreary, cheerless" , "Depressing; dreary" , "Wretched" .)