American Red Cross founder Barton (5)
I believe the answer is:
clara
'american red cross founder barton' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for clara that I've seen before include "Woman" , "Home town of the Taoiseach" , "Butt" , "- Bow, US actress, the 'It Girl'" , "Schumann" .)