Anxious person loves bun and free bananas (1,6,2,6)

I believe the answer is:

a bundle of nerves

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'anxious person' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'loves bun and free bananas' is the wordplay.
'bananas' indicates anagramming the letters (informal term for mad).
'loves'+'bun'+'and'+'free'='lovesbunandfree'
'lovesbunandfree' with letters rearranged gives 'A BUNDLE OF NERVES'.

Can you help me to learn more?

(Other definitions for a bundle of nerves that I've seen before include "very jittery" , "Personal communications network" .)

I've seen this clue in The Hindu.

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