In a state, Nurse Batty welcomes midwives and leading obstetrician (7)
I believe the answer is:
nervous
'midwives and leading obstetrician' is the definition.
I can't tell whether this definition defines the answer.
'in a state nurse batty welcomes' is the wordplay.
'in a state' becomes 'vo' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'batty' indicates anagramming the letters.
'welcomes' is an insertion indicator.
'nurse' anagrammed gives 'nerus'.
'vo' put into 'nerus' is 'NERVOUS'.
Can you help me to learn more?
(Other definitions for nervous that I've seen before include "Highly-strung" , "stewing" , "On edge, anxious" , "far from cool?" , "Highly strung" .)