Violent wind and low cloud right by a lake (7)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

The setter is giving us a bit more help by providing a description of the type of wind we are looking for, and MISTRAL is one of the better known, being a strong, cold, dry northwesterly wind from the Massif Central/Alps down the Rhone valley into the Mediterranean. The wordplay is MIST for “low cloud” + R + A + L.