4 down - wavering, tempermental, volatile (8)
7 down - family planning (13)
15 down - solitary person (4,4)
19 down - depressing, not bright (6)
20 down - Complain, whine (6)
Hi - just started doing this crossword a short time ago - I think 19 down is dreary, not dismal, tho you will probably have realised by this time, as dismal doesn't fit in. Good luck!