Observed description of plain cake! (7)
I believe the answer is:
noticed
'observed' is the definition.
(similar in meaning)
'description of plain cake' is the wordplay.
I cannot quite understand how this works, but
'of' could be 'o' and 'o' is located in the answer.
'cake' could be 'ice' (I have seen 'Top cake' mean 'ice' so perhaps 'cake' could also mean 'ice') and 'ice' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for noticed that I've seen before include "Realised" , "Became aware of" , "Marked" , "Seen" , "Detected" .)