Question of putting two and two together? (3)
I believe the answer is:
sum
'question' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their base form.
Maybe there's an association between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for sum that I've seen before include "Total, add" , "All one has" , "Amount, aggregate" , "Add together" , "An additional problem" .)