Going around island, day works fine (12)
I believe the answer is:
satisfactory
'fine' is the definition.
(I've seen this before)
'going around island day works' is the wordplay.
'going around island day' becomes 'satis' (I can't explain this - if you can you should give a lot more credence to this answer).
'works' becomes 'factory' (factory is a kind of works).
'satis'+'factory'='SATISFACTORY'
Can you help me to learn more?
(Other definitions for satisfactory that I've seen before include "Acceptable - adequate" , "Fully acceptable" , "Fulfilling expectations" , "OK" , "Meeting expectations" .)