Had trouble with, as an icy road

The answer to the crossword question ‘Had trouble with, as an icy road is SLIDON‘ is ‘slipped on‘. The clue refers to the difficulty one faces while driving on an icy road where the car may lose traction and slip. The word ‘slidon‘ seems to be a made-up word derived from ‘slip‘ and ‘on‘, which fits the context of the clue. Therefore, the accurate answer to the crossword question is ‘slipped on‘.