Called from the step (4)
I believe the answer is:
rung
I believe this is a double definition.
'called' is the first definition.
(I've seen this before)
'the step' is the second definition.
(thesaurus)
'from' acts as a link.
(Other definitions for rung that I've seen before include "Phoned" , "Part of a ladder" , "Level in a hierarchy" , "Telephoned" , "Tolled - step on ladder" .)