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 they are linked in a way I don't understand?
'as backup she provides a' is the wordplay.
I cannot quite see how this works, but
'she' could be 'dian' and 'dian' is found in the answer.
'a' is within the answer.
This accounts for all the letters.
This may be the basis of the 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" .)