Ill-disposed to accept daughter is bad (7)
I believe the answer is:
adverse
'is bad' is the definition.
(I've seen this in another clue)
'ill-disposed to accept daughter' is the wordplay.
'ill-disposed' becomes 'averse' (I've seen this before).
'to accept' means one lot of letters goes inside another.
'daughter' becomes 'd' (genealogical abbreviation).
'averse' enclosing 'd' is 'ADVERSE'.
(Other definitions for adverse that I've seen before include "negative result" , "Opposed - inauspicious - opposite" , "Dire" , "Inimical" , "Detrimental" .)