Maybe because I'm under the weather I'm struggling.
9a. Vessel perfectly visible around united part of Europe (7) t-g-o-t. Tugboat?
11a. Form of identification - one abandoned by S American state (7). s-r-a--.
22a. Plant in holiday venue - ring-shaped, some say (9) c-----u-a.
25a. Forbidden to enclose key informal communication (7). n-----t. Notelet?
And that's just the across ones...