Melissa is resolved to be irresolute (7)

I believe the answer is:

aimless

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'irresolute' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

'melissa is resolved' is the wordplay.
'is resolved' indicates an anagram.
'melissa' with letters rearranged gives 'AIMLESS'.

'to be' is the link.

Can you help me to learn more?

(Other definitions for aimless that I've seen before include "Haphazard" , "Without objectives" , "Without direction or ambition" , "Rambling" , "Drifting with no purpose" .)

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