Depict in semaphore (3)
I believe the answer is:
map
'depict' is the definition.
(thesaurus)
'in semaphore' is the wordplay.
'in' indicates the answer is hidden within the clue.
'MAP' is hidden within 'semaphore'.
(Other definitions for map that I've seen before include "(Make a) geographical representation" , "Diagram of an area" , "Chart" , "Diagram of part of the earth's surface" , "Travel guide" .)