A piece of cake, clearly fresh (15)

I believe the answer is:

straightforward

I'm a little stuck... Click here to teach me more about this clue!

'a piece of cake' is the definition.

'clearly fresh' is the wordplay.
'clearly' becomes 'straight' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'fresh' becomes 'forward' (similar in meaning).
'straight'+'forward'='STRAIGHTFORWARD'

Can you help me to learn more?

(Other definitions for straightforward that I've seen before include "Plain sailing" , "Right on!" , "Honest, open" , "Easy to understand" , "Clear" .)

I've seen this clue in The Sunday Times and The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.