This has been asked before by me but I wonder if there are anymore ideas as to the answer - or if the compiler has made an error.
30a. Coastal lagoon separated from the sea by a spit of land (4) H?A?
The 2 letters given are correct and the only answer to do with water is HAAF. This is a deep sea fishing ground off Orkney and Sheland.
Any ideas out there please?