Enthused to stick around, she's first on isle (10)
I believe the answer is:
passionate
'enthused' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives occasionally mean the same thing.
'stick around she's first on isle' is the wordplay.
'stick' becomes 'paste' (as in sticking or pasting something down).
'around' indicates putting letters inside.
'she's first' becomes 's' (ist letter of 'she').
'on isle' becomes 'iona' (I can't explain this - if you can you should give a lot more credence to this answer).
's'+'iona'='siona'
'paste' enclosing 'siona' is 'PASSIONATE'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for passionate that I've seen before include "Strongly emotional" , "Easily moved" , "Most eager" , "Ardent" , "Showing strong emotions" .)