Crossword Genius

Having butterflies fluttering over sun? (7)

Ross

I believe the answer is:

nervous

I'm a little stuck... Click here to teach me more about this clue!

'having butterflies' is the definition.
I can't tell whether this defines the answer.

'fluttering over sun?' is the wordplay.
'fluttering' indicates anagramming the letters.
'over'+'sun'='oversun'
'oversun' anagrammed gives 'NERVOUS'.

Can you help me to learn more?

(Other definitions for nervous that I've seen before include "Frightened" , "full of trepidation" , "'Apprehensive, uneasy (7)'" , "Twitchy" , "Easily agitated, timid" .)

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