Ladder step made a call (4)
I believe the answer is:
rung
This could be a double definition.
'ladder step' is the first definition.
(I've seen this before)
'made a call' is the second definition.
The answer and definition can be both to do with communicating as well as being past participle verbs.
Perhaps there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for rung that I've seen before include "support for foot" , "Horizontal bar in ladder" , "Telephoned" , "Phoned" , "Part of a ladder" .)