Short informal letter (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">short informal letter</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for note that I've seen before include "Tone of a short record" , "Heed; short letter" , "Observation" , "Sound, record" , "Comment" .)
(Other definitions for loos that I've seen before include "Conveniences" , "Austrian architect" .)