Did Mark like particular cakes? (7)
I believe the answer is:
noticed
'did mark' is the definition.
('notice' can be a synonym of 'mark')
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for noticed that I've seen before include "Observed or saw" , "Perceived or observed" , "Clocked" , "Detected" , "Realised" .)