Majority around island - not dry (5)
I believe the answer is:
moist
'not dry' is the definition.
(moist means damp or wet)
'majority around island' is the wordplay.
'majority' becomes 'most' (most of a group).
'around' is an insertion indicator.
'island' becomes 'i' (geographical abbreviation).
'most' enclosing 'i' is 'MOIST'.
(Other definitions for moist that I've seen before include "Dampish" , "bit wet" , "Damp or clammy" , "lubricated" , "sloppy" .)