Thank you everyone for your help. I think I've exhausted all avenues of enquiry for Clara Elizabeth. She doesn't seem to be on the 1891 census as born in Bawburgh. I did trawl through in case she'd claimed to be born in Norwich, but there were very few of the right age (50 though I checked a few older or younger).
Her marriage or death are not recorded on Freereg or FreeBMD I'm beginning to wonder if she simply changed her name (Elizabeth Tanner would be close but untraceable) or lived with a man she did not marry.
I did discover through a PM from a Rootschatter, that her father was imprisoned for assault in 1863, having attacked both her mother, and Clara who tried to defend her, in an argument over money.
Her father then left the family and was imprisoned again in 1869, this time for bigamy.
Meanwhile her mother married again -at least twice -was tried for bigamy and acquitted. Freereg has both marriages. Husband number 2 died and the next marriage was 6 years later. However while both her forenames, her father's name and occupation are the same she has another surname ,so possibly married again in the interim, though I can find no record of it.
By 1873 her brothers have died and her younger sister has married. In short Clara might have been wise to clear off without a forwarding address!