To back her is a help (5)
I believe the answer is:
diana
'help' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'to back her is a' is the wordplay.
I cannot really understand how this works, but
'her' could be 'dian' and 'dian' is found in the answer.
'a' is within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for diana that I've seen before include "Woman" , "British princess" , "Roman goddess of the hunt, or tragic English princess" , "Roman goodess of hunting or tragic English princess" , "MONKEY" .)