Proposed (6,3,8)
I think it could be either:
popped the question
'proposed' is the definition.
('pop the question' can be a synonym of 'propose')
This is all the clue.
'proposed' is the definition.
('suggest' can be a synonym of 'propose')
This is the entire clue.
(Other definitions for suggested that I've seen before include "Hinted at" , "Proposed, recommended" , "Made a proposal" .)