Quite apart from the meaning of 'R', I'm finding this utterly impenetrable...
13 ac. RNLI with four bad wrecks (10) _L_R___N_A
6 dn. Jolly threatening gannet? (4,6) D_V_ ______ Dive Bomber? If so why?
12 ac. Where to fin quick fix (4).
3. Have a little bit of meat, R maybe (4)
23. Inundate Cologne with R (5)