Atlantic arm (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">atlantic arm</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for baltic that I've seen before include "cold waters" , "Scandinavian sea" , "Northern European sea" , "Sea of northern Europe" , "Coming from Tallinn, perhaps" .)
(Other definitions for north sea that I've seen before include "'It lies between Britain and Scandinavia (5,3)'" , "Water to east of UK" , "Waters east of the UK" , "UK's source of oil, gas" , "Area of natural gas" .)
(Other definitions for irish sea that I've seen before include "Waters around IOM" , "Water west of Wales" , "Man's situation" , "Waters separating Ireland from England and Wales" , "Man's found here" .)