A trip around some islands (4)
I believe the answer is:
sail
'a trip' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe there's an association between them I don't understand?
'around some islands' is the wordplay.
'around' becomes 'sai' (I can't explain this - if you can you should believe this answer much more).
'some' says to take the centre.
'islands' becomes 'Malta' (island nation).
The centre of 'malta' is 'l'.
'sai'+'l'='SAIL'
Can you help me to learn more?
(Other definitions for sail that I've seen before include "Canvas on board" , "Travel on water propelled by wind" , "Go by boat" , "Ship's canvas" , "project" .)