Beloved nun fears being redeployed; she's really anxious (1,6,2,6)
I believe the answer is:
a bundle of nerves
'she's really anxious' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'beloved nun fears being redeployed' is the wordplay.
'being redeployed' indicates anagramming the letters.
'beloved'+'nun'+'fears'='belovednunfears'
'belovednunfears' is an anagram of 'A BUNDLE OF NERVES'.
Can you help me to learn more?
(Other definitions for a bundle of nerves that I've seen before include "Personal communications network" , "very jittery" .)