All the answers only have the vowel e in them.
7 This flies around a couple of times to set on you (6)
9 A sad poem sounds like a grey day(6)
11 A carrier of good or bad (9)
12 They may be required for parts of this (4,5)
20 This is due by this (9,13)
49 Judged to be the best (4,5)
Thanks for any help
Rats - yes, it was meant to be twelve but my "one" key on my laptop does not work so I have to use the online keyboard just for that "one" key. I guess I forgot.... Still, hopefully Cleo knew what I meant.