As backup, she provides a bit of help (5)
I believe the answer is:
diana
'bit of help' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
'as backup she provides a' is the wordplay.
I cannot really understand how this works, but
'she' could be 'dian' and 'dian' is present in the answer.
'a' is present in the answer.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for diana that I've seen before include "Roman goddess of the moon and hunting" , "female" , "Roman godess of the hunt" , "British princess" , "Roman goddess equating to Artemis" .)