Lookout man (7)
I believe the answer is:
spotter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lookout man</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for spotter that I've seen before include "scout?" , "One who looks to train" , "Observer" , "Spy plane" , "artist such as Seurat?" .)