She gets Dora upset and out of breath (5)
I believe the answer is:
rhoda
'out of breath' is the definition.
The definition suggests a singular noun which matches the answer.
'she gets dora upset' is the wordplay.
'she' becomes 'h' (I can't justify this - if you can you should give a lot more credence to this answer).
'gets' indicates putting letters inside.
'upset' is an anagram indicator.
'dora' with letters rearranged gives 'roda'.
'h' placed into 'roda' is 'RHODA'.
'and' is the link.
Can you help me to learn more?
(Other definitions for rhoda that I've seen before include "Girl's name; hoard (anag.)" , "Woman" , "Girl" , "Fem. name; hoard (anag.)" .)