Rod will make a change (6)
I believe the answer is:
switch
I believe this clue is a triple definition!
'rod' is the first definition.
(I've seen this before)
'will' is a link.
'make' is the second definition.
(thesaurus)
'a change' is the third definition.
(switch is a kind of change)
(Other definitions for switch that I've seen before include "Circuit-breaker" , "Change; hair-piece" , "Change or cane" , "Exchange positions for flexible rod or whip" , "On/off device" .)