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