NB (4,4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nb</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nota bene that I've seen before include "NB in full" , "Pay particular attention to" , "Expansion of Latin notation N.B." , "Observe carefully (Latin)" , "'Mark well, in Latin (4,4)'" .)
(Other definitions for take note that I've seen before include "what the stenographer does" , "Pay attention" , "Observe closely" , "mark?" , "Observe and absorb - jot it down" .)
(Another definition for notabene that I've seen is " Take notice".)