Thanks jolan for a frustrating set (just joking, really - I have ideas for all of them, but most I haven't worked through)
2 ISCHIA - subtractive anagram of "sophisticated" without "spotted"
5 JIBING ROUND? - "jib" is decline to accept, and it is a means of changing course in a sailing boat*. Don't see the "IN GROUND" bit, though.
* for info, in jibing, the stern passes through where the wind is coming from. This is potentially much more hazardous than "tacking", in which the bow passes through the wind direction. In jibing, the mainsail can be blown across rather violently.