Leave and cross a small island (4)
I believe the answer is:
gozo
'a small island' is the definition.
'gozo' can be an answer for 'island' (I've seen this before). I'm unsure of the 'a small' bit.
'leave and cross' is the wordplay.
'leave' becomes 'go' (to go is to depart or leave).
'and' is a charade indicator (letters next to each other).
'cross' becomes 'zo' (I've seen this in other clues).
'go'+'zo'='GOZO'
Can you help me to learn more?
(Other definitions for gozo that I've seen before include "Some land in Mediterranean" , "Malta's second largest island" , "Maltese island" , "22 [FT SETTER]" , "Mediterranean island" .)