Understood

The clue is a definition-type that asks for a synonym for the word ‘understood‘. In the crossword, the answer to this clue is ‘grasped‘. When something is understood, it means that it has been comprehended or grasped mentally. So, ‘grasped‘ is a suitable word for the crossword answer as it is synonymous with understood. Therefore, the answer to the crossword question is ‘grasped‘.