One piece of toast ample? (5)
I believe the answer is:
round
'one piece' is the definition.
(round is a kind of piece)
'of toast ample?' is the wordplay.
I cannot really see how this works, but
'of' could be 'o' and 'o' is found within the answer.
The remaining letters 'rund' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for round that I've seen before include "session" , "Description of Tweedledum" , "Game of golf" , "balls are like this" , "Circular - 18 holes" .)