Called on (7)
I believe the answer is:
visited
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">called on</span>' is the definition.<br/ ><span class="explanation-format__explanation">('visit' can be a synonym of 'call on')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for visited that I've seen before include "Looked up" , "Saw" , "Went to see" , "came to see" , "Called in (5)" .)