Sea in northern Europe (6)
I believe the answer is:
baltic
'sea in northern europe' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for baltic that I've seen before include "Near-landlocked sea of N Europe" , "water, lots" , "Near land-locked sea of Scandinavia" , "Northern European sea" , "Nearly land-locked sea of Scandinavia" .)