Loch near the Moray Firth (4)
I believe the answer is:
ness
'loch near the moray firth' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ness that I've seen before include "Headland, promontory" , "Headland, cape" , "something added for quality" , "Eliot -, led effort against Al Capone; Scots loch" , "Scottish Lough of monster myth" .)