Daughter is girl getting sack (7)
I believe the answer is:
dismiss
'sack' is the definition.
(synonyms)
'daughter is girl getting' is the wordplay.
'daughter' becomes 'dis' (I've seen this in other clues).
'is girl' becomes 'miss' (I've seen this before).
'getting' means one lot of letters go next to another.
'dis'+'miss'='DISMISS'
(Other definitions for dismiss that I've seen before include "Fire - cashier" , "Sack - send away" , "Sack - cashier" , "Cease to consider" , "Drop" .)