Called for a step (4)
I believe the answer is:
rung
I believe this is a double definition.
'called' is the first definition.
(ring can mean to call on the phone)
'a step' is the second definition.
(I've seen this before)
'for' acts as a link.
(Other definitions for rung that I've seen before include "Telephoned" , "support for foot" , "Step up the ladder - called for" , "Level in a hierarchy" , "Tolled - step on ladder" .)