Opportunity for stating opinion, for example (3)
I believe the answer is:
say
I believe this is a double definition.
'opportunity for stating opinion' is the first definition.
(as in getting a say in a decision)
'for example' is the second definition.
('say' can be used to introduce an example)
(Other definitions for say that I've seen before include "Utter; e.g." , "by way of example" , "Chance to speak" , "power" , "Tell" .)