Decline to answer question but get through (4)
I believe the answer is:
pass
I believe this is a quadruple definition!!
'decline' is the first definition.
(I've seen this in another clue)
'to answer' is the second definition.
(thesaurus)
'question' is the third definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'but' is a link.
'get through' is the fourth definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for pass that I've seen before include "pointless bid" , "What a hooker may do" , "acceptable exam result" , "Mountain defile" , "Expression of ignorance" .)