Continue pleading – getting one a flower (7)
I believe the answer is:
'flower' is the definition.
(begonia is a kind of flower)
'continue pleading getting one a' is the wordplay.
I cannot quite understand how this works, but
'continue' could be 'on' (I've seen this in other clues) and 'on' is found in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
'a' is within the answer.
The remaining letters 'beg' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for begonia that I've seen before include "bloomer", "Herbaceous plant whose flowers have no petals", "Common garden plant", "colourful flower", "Tropical plant".)