Plainly written name in iced cake (2,5)
I believe the answer is:
en clair
'plainly written name in iced cake' is the definition.
I can't judge whether this definition defines the answer.
'name in iced cake' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'in' indicates putting letters inside.
'iced cake' becomes 'eclair' (I've seen this before. I am not sure about the 'iced' bit.).
'n' inserted into 'eclair' is 'EN CLAIR'.
Can you help me to learn more?
(Other definitions for en clair that I've seen before include "It's easy to get" , "N ot in code/cipher" , "in common parlance" , "in plain language" , "Put straightforwardly" .)